Posições de Container-Box

Pessoal, estou com uma grande dúvida. Em meu site, eu tenho o arquivo Index.php que é a página inicial, e o Register.php que é a página para se registrar. E eu dividi a estrutura Html da página como está na imagem (Essa seria o Index.php):

/applications/core/interface/imageproxy/imageproxy.php?img=https://image.prntscr.com/image/ncBm5FvkSj2esG7g8OI_SQ.png&key=a236b9b81283b1a0302a7e032736e5883a8c76c0efd3b98fb24441ddeef4eda3" width="1000" />

A minha dúvida é a seguinte, Eu criei os painéis da esquerda tudo certo. E o painel do centro, fica as noticias e ele está na posição certa, na qual eu quero que fique.

Mas quando eu entro na página Register.php o centro fica todo mal posicionado, como na foto abaixo:

/applications/core/interface/imageproxy/imageproxy.php?img=https://image.prntscr.com/image/uPzChtKWTgaEwiivK6C0mQ.png&key=944fd18ebe4f6e0ea1fd6ca25fadfd5d4032169563fe8e1f073a8e52f35f619e" width="1000" />

A Register está muito mais acima do que era pra estar, o correto seria ela estar posicionada igual a do centro na primeira foto.

Se alguém puder me ajudar, ficarei grato!

Style.css

.mid-container
{

	background: white;
	width: 550px;
	position: absolute;
 margin-top: 200px;
 margin-left: 50%;
 margin-right: -50%;
	margin-bottom: 40px;
 transform: translate(-50%, -50%);
}

.left-container

{

	width: 200px;
	height: 960px;
	position: absolute;
 top: 1350px;
 left: 50%;
 margin-right: -50%;
	margin-bottom: 40px;
 transform: translate(-260%, -115%)
}

.right-container

{

	width: 200px;
	height: 960px;
	position: absolute;
 top: 1350px;
 left: 50%;
 margin-right: -50%;
	margin-bottom: 40px;
 transform: translate(165%, -115%)
}

.left_box, .right_box, .mid_box
{

	width: 100%;
	position: relative;
	margin-bottom: 18px;
}

	 

	**E a minha Html do Register está assim:**

<?php
require_once 'engine/init.php';
logged_in_redirect();
include 'layout/overall/header.php';
include 'index2.php';

if (empty($_POST) === false) {
	// $_POST['']
	$required_fields = array('username', 'password', 'password_again', 'email', 'selected');
	foreach($_POST as $key=>$value) {
 if (empty($value) && in_array($key, $required_fields) === true) {
 $errors[] = 'You need to fill in all fields.';
 break 1;
 }
	}

	// check errors (= user exist, pass long enough
	if (empty($errors) === true) {
 /* Token used for cross site scripting security */
 if (!Token::isValid($_POST['token'])) {
 $errors[] = 'Token is invalid.';
 }

 if ($config['use_captcha']) {
 $captcha = (isset($_POST['g-recaptcha-response'])) ? $_POST['g-recaptcha-response'] : false;
 if(!$captcha) {
 $errors[] = 'Please check the the captcha form.';
 } else {
 $secretKey = $config['captcha_secret_key'];
 $ip = $_SERVER['REMOTE_ADDR'];
 // curl start
 $curl_connection = curl_init("https://www.google.com/recaptcha/api/siteverify");
 $post_string = "secret=".$secretKey."&response=".$captcha."&remoteip=".$ip;
 curl_setopt($curl_connection, CURLOPT_CONNECTTIMEOUT, 5);
 curl_setopt($curl_connection, CURLOPT_RETURNTRANSFER, true);
 curl_setopt($curl_connection, CURLOPT_SSL_VERIFYPEER, false);
 curl_setopt($curl_connection, CURLOPT_FOLLOWLOCATION, 0);
 curl_setopt($curl_connection, CURLOPT_POSTFIELDS, $post_string);
 $response = curl_exec($curl_connection);
 curl_close($curl_connection);
 // Curl end
 $responseKeys = json_decode($response,true);
 if(intval($responseKeys["success"]) !== 1) {
 $errors[] = 'Captcha failed.';
 }
 }
 }

 if (user_exist($_POST['username']) === true) {
 $errors[] = 'Sorry, that username already exist.';
 }

 // Don't allow "default admin names in config.php" access to register.
 $isNoob = in_array(strtolower($_POST['username']), $config['page_admin_access']) ? true : false;
 if ($isNoob) {
 $errors[] = 'This account name is blocked for registration.';
 }
 if (preg_match("/^[a-zA-Z0-9]+$/", $_POST['username']) == false) {
 $errors[] = 'Your account name can only contain characters a-z, A-Z and 0-9.';
 }
 // name restriction
 $resname = explode(" ", $_POST['username']);
 foreach($resname as $res) {
 if(in_array(strtolower($res), $config['invalidNameTags'])) {
 $errors[] = 'Your username contains a restricted word.';
 }
 else if(strlen($res) == 1) {
 $errors[] = 'Too short words in your name.';
 }
 }
 if (strlen($_POST['username']) > 32) {
 $errors[] = 'Your account name must be less than 33 characters.';
 }
 // end name restriction
 if (strlen($_POST['password']) < 6) {
 $errors[] = 'Your password must be at least 6 characters.';
 }
 if (strlen($_POST['password']) > 100) {
 $errors[] = 'Your password must be less than 100 characters.';
 }
 if ($_POST['password'] !== $_POST['password_again']) {
 $errors[] = 'Your passwords do not match.';
 }
 if (filter_var($_POST['email'], FILTER_VALIDATE_EMAIL) === false) {
 $errors[] = 'A valid email address is required.';
 }
 if (user_email_exist($_POST['email']) === true) {
 $errors[] = 'That email address is already in use.';
 }
 if ($_POST['selected'] != 1) {
 $errors[] = 'You are only allowed to have an account if you accept the rules.';
 }
 if (validate_ip(getIP()) === false && $config['validate_IP'] === true) {
 $errors[] = 'Failed to recognize your IP address. (Not a valid IPv4 address).';
 }
 if (strlen($_POST['flag']) < 1) {
 $errors[] = 'Please choose country.';
 }
	}
}

?>

<html>
	<div class="mid-container">
 <div class="mid_box">
 <h1>Register Account</h1>
 </div>
</html>

<?php
if (isset($_GET['success']) && empty($_GET['success'])) {
	if ($config['mailserver']['register']) {
?>

<html>
	<h1>Email authentication required</h1>
	<p>We have sent you an email with an activation link to your submitted email address.</p>
	<p>If you can't find the email within 5 minutes, check your <strong>junk/trash inbox (spam filter)</strong> as it may be mislocated there.</p>
</html>

<?php
	} else echo 'Congratulations! Your account has been created. You may now login to create a character.';
} elseif (isset($_GET['authenticate']) && empty($_GET['authenticate'])) {
	// Authenticate user, fetch user id and activation key
	$auid = (isset($_GET['u']) && (int)$_GET['u'] > 0) ? (int)$_GET['u'] : false;
	$akey = (isset($_GET['k']) && (int)$_GET['k'] > 0) ? (int)$_GET['k'] : false;
	// Find a match
	$user = mysql_select_single("SELECT `id`, `active` FROM `znote_accounts` WHERE `account_id`='$auid' AND `activekey`='$akey' LIMIT 1;");
	if ($user !== false) {
 $user = (int) $user['id'];
 $active = (int) $user['active'];
 // Enable the account to login
 if ($active == 0) {
 mysql_update("UPDATE `znote_accounts` SET `active`='1' WHERE `id`= $user LIMIT 1;");
 }
 echo '<h1>Congratulations!</h1> <p>Your account has been created. You may now login to create a character.</p>';
	} else {
 echo '<h1>Authentication failed</h1> <p>Either the activation link is wrong, or your account is already activated.</p>';
	}

} else {

	if (empty($_POST) === false && empty($errors) === true) {
 if ($config['log_ip']) {
 znote_visitor_insert_detailed_data(1);
 }

 //Register
 $register_data = array(
 'name' =>	$_POST['username'],
 'password'	=>	$_POST['password'],
 'email' =>	$_POST['email'],
 'created'	=>	time(),
 'ip' =>	getIPLong(),
 'flag' => $_POST['flag']
 );

 user_create_account($register_data, $config['mailserver']);
 if (!$config['mailserver']['debug']) header('Location: register.php?success');
 exit();
 //End register

	} else if (empty($errors) === false){
 echo '<font color="red"><b>';
 echo output_errors($errors);
 echo '</b></font>';
	}
?>

	<html>
	<div class="mid_box">
	<form action="" method="post">
 <ul>
 <li>
 Account Name:<br>
 <input type="text" name="username">
 </li>
 <li>
 Password:<br>
 <input type="password" name="password">
 </li>
 <li>
 Password again:<br>
 <input type="password" name="password_again">
 </li>
 <li>
 Email:<br>
 <input type="text" name="email">
 </li>
 <li>
 Country:<br>
 <select name="flag">
 <option value="">(Please choose)</option><option value="af"> Afghanistan </option><option value="al"> Albania </option><option value="dz"> Algeria </option><option value="as"> American Samoa </option><option value="ad"> Andorra </option><option value="ao"> Angola </option><option value="ai"> Anguilla </option><option value="aq"> Antarctica </option><option value="ag"> Antigua and Barbuda </option><option value="ar"> Argentina </option>
 <option value="am"> Armenia </option><option value="aw"> Aruba </option><option value="au"> Australia </option><option value="at"> Austria </option><option value="az"> Azerbaijan </option><option value="bs"> Bahamas </option><option value="bh"> Bahrain </option><option value="bd"> Bangladesh </option><option value="bb"> Barbados </option><option value="by"> Belarus </option><option value="be"> Belgium </option><option value="bz"> Belize </option><option value="bj"> Benin </option><option value="bm"> Bermuda </option><option value="bt"> Bhutan </option><option value="bo"> Bolivia </option><option value="ba"> Bosnia and Herzegowina </option><option value="bw"> Botswana </option><option value="bv"> Bouvet Island </option><option value="br"> Brazil </option><option value="io"> British Indian Ocean Territory </option><option value="bn"> Brunei Darussalam </option><option value="bg"> Bulgaria </option><option value="bf"> Burkina Faso </option><option value="bi"> Burundi </option>
 <option value="kh"> Cambodia </option><option value="cm"> Cameroon </option><option value="ca"> Canada </option><option value="cv"> Cape Verde </option><option value="ky"> Cayman Islands </option><option value="cf"> Central African Republic </option><option value="td"> Chad </option><option value="cl"> Chile </option><option value="cn"> China </option><option value="cx"> Christmas Island </option><option value="cc"> Cocos Islands </option><option value="co"> Colombia </option><option value="km"> Comoros </option><option value="cd"> Congo </option><option value="cg"> Congo </option><option value="ck"> Cook Islands </option><option value="cr"> Costa Rica </option><option value="ci"> Cote DIvoire </option><option value="hr"> Croatia </option><option value="c*"> Cuba </option><option value="cy"> Cyprus </option><option value="cz"> Czech Republic </option><option value="dk"> Denmark </option><option value="dj"> Djibouti </option><option value="dm"> Dominica </option>
 <option value="do"> Dominican Republic </option><option value="tp"> East Timor </option><option value="ec"> Ecuador </option><option value="eg"> Egypt </option><option value="sv"> El Salvador </option><option value="gq"> Equatorial Guinea </option><option value="er"> Eritrea </option><option value="ee"> Estonia </option><option value="et"> Ethiopia </option><option value="fk"> Falkland Islands </option><option value="fo"> Faroe Islands </option><option value="fj"> Fiji </option><option value="fi"> Finland </option><option value="fr"> France </option><option value="gf"> French Guiana </option><option value="pf"> French Polynesia </option><option value="tf"> French Southern Territories </option><option value="ga"> Gabon </option><option value="gm"> Gambia </option><option value="ge"> Georgia </option><option value="de"> Germany </option><option value="gh"> Ghana </option><option value="gi"> Gibraltar </option><option value="gr"> Greece </option>
 <option value="gl"> Greenland </option><option value="gd"> Grenada </option><option value="gp"> Guadeloupe </option><option value="gu"> Guam </option><option value="gt"> Guatemala </option><option value="gn"> Guinea </option><option value="gw"> Guinea-Bissau </option><option value="gy"> Guyana </option><option value="ht"> Haiti </option><option value="hm"> Heard and Mc Donald Islands </option><option value="hn"> Honduras </option><option value="hk"> Hong Kong </option><option value="hu"> Hungary </option><option value="is"> Iceland </option><option value="in"> India </option><option value="id"> Indonesia </option><option value="ir"> Iran </option><option value="iq"> Iraq </option><option value="ie"> Ireland </option><option value="il"> Israel </option><option value="it"> Italy </option><option value="jm"> Jamaica </option><option value="jp"> Japan </option><option value="jo"> Jordan </option><option value="kz"> Kazakhstan </option><option value="ke"> Kenya </option>
 <option value="ki"> Kiribati </option><option value="kr"> Korea </option><option value="kp"> Korea </option><option value="kw"> Kuwait </option><option value="kg"> Kyrgyzstan </option><option value="la"> Lao Peoples Democratic Republic </option><option value="lv"> Latvia </option><option value="lb"> Lebanon </option><option value="ls"> Lesotho </option><option value="lr"> Liberia </option><option value="ly"> Libyan Arab Jamahiriya </option><option value="li"> Liechtenstein </option><option value="lt"> Lithuania </option><option value="lu"> Luxembourg </option><option value="mo"> Macau </option><option value="mk"> Macedonia </option><option value="mg"> Madagascar </option><option value="mw"> Malawi </option><option value="my"> Malaysia </option><option value="mv"> Maldives </option><option value="ml"> Mali </option><option value="mt"> Malta </option><option value="mh"> Marshall Islands </option><option value="mq"> Martinique </option>
 <option value="mr"> Mauritania </option><option value="mu"> Mauritius </option><option value="yt"> Mayotte </option><option value="mx"> Mexico </option><option value="fm"> Micronesia </option><option value="md"> Moldova </option><option value="mc"> Monaco </option><option value="mn"> Mongolia </option><option value="ms"> Montserrat </option><option value="ma"> Morocco </option><option value="mz"> Mozambique </option><option value="mm"> Myanmar </option><option value="na"> Namibia </option><option value="nr"> Nauru </option><option value="np"> Nepal </option><option value="nl"> Netherlands </option><option value="an"> Netherlands Antilles </option><option value="nc"> New Caledonia </option><option value="nz"> New Zealand </option><option value="ni"> Nicaragua </option><option value="ne"> Niger </option><option value="ng"> Nigeria </option><option value="nu"> Niue </option><option value="nf"> Norfolk Island </option><option value="mp"> Northern Mariana Islands </option>
 <option value="no"> Norway </option><option value="om"> Oman </option><option value="pk"> Pakistan </option><option value="pw"> Palau </option><option value="pa"> Panama </option><option value="pg"> Papua New Guinea </option><option value="py"> Paraguay </option><option value="pe"> Peru </option><option value="ph"> Philippines </option><option value="pn"> Pitcairn </option><option value="pl"> Poland </option><option value="pt"> Portugal </option><option value="pr"> Puerto Rico </option><option value="qa"> Qatar </option><option value="re"> Reunion </option><option value="ro"> Romania </option><option value="ru"> Russian Federation </option><option value="rw"> Rwanda </option><option value="kn"> Saint Kitts and Nevis </option><option value="lc"> Saint Lucia </option><option value="ws"> Samoa </option><option value="sm"> San Marino </option><option value="st"> Sao Tome and Principe </option><option value="sa"> Saudi Arabia </option><option value="sn"> Senegal </option>
 <option value="sc"> Seychelles </option><option value="sl"> Sierra Leone </option><option value="sg"> Singapore </option><option value="sk"> Slovakia </option><option value="si"> Slovenia </option><option value="sb"> Solomon Islands </option><option value="so"> Somalia </option><option value="za"> South Africa </option><option value="es"> Spain </option><option value="lk"> Sri Lanka </option><option value="sh"> St. Helena </option><option value="pm"> St. Pierre and Miquelon </option><option value="sd"> Sudan </option><option value="sr"> Suriname </option><option value="sj"> Svalbard and Jan Mayen Islands </option><option value="sz"> Swaziland </option><option value="se"> Sweden </option><option value="ch"> Switzerland </option><option value="sy"> Syrian Arab Republic </option><option value="tw"> Taiwan </option><option value="tj"> Tajikistan </option><option value="tz"> Tanzania </option>
 <option value="th"> Thailand </option><option value="tg"> Togo </option><option value="tk"> Tokelau </option><option value="to"> Tonga </option><option value="tt"> Trinidad and Tobago </option><option value="tn"> Tunisia </option><option value="tr"> Turkey </option><option value="tm"> Turkmenistan </option><option value="tc"> Turks and Caicos Islands </option><option value="tv"> Tuvalu </option><option value="ug"> Uganda </option><option value="ua"> Ukraine </option><option value="ae"> United Arab Emirates </option><option value="gb"> United Kingdom </option><option value="us"> United States </option><option value="uy"> Uruguay </option><option value="uz"> Uzbekistan </option><option value="vu"> Vanuatu </option><option value="va"> Vatican </option><option value="ve"> Venezuela </option><option value="vn"> Viet Nam </option><option value="vg"> Virgin Islands (British) </option><option value="vi"> Virgin Islands (US) </option>
 <option value="wf"> Wallis and Futuna Islands </option><option value="eh"> Western Sahara </option><option value="ye"> Yemen </option><option value="yu"> Yugoslavia </option><option value="zm"> Zambia </option><option value="zw"> Zimbabwe </option>
 </select>
 </li>
 </ul>
	</html>

 <?php
 if ($config['use_captcha']) {
 ?>
 <li>
 <div class="g-recaptcha" data-sitekey="<?php echo $config['captcha_site_key']; ?>"></div>
 </li>
 <?php
 }
 ?>

	<html>
 <ul>
 <li>
 <h2>Server Rules</h2>
 <p>The golden rule: Have fun.</p>
 <p>If you get pwn3d, don't hate the game.</p>
 <p>No <a href='http://en.wikipedia.org/wiki/Cheating_in_video_games' target="_blank">cheating</a> allowed.</p>
 <p>No <a href='http://en.wikipedia.org/wiki/Video_game_bot' target="_blank">botting</a> allowed.</p>
 <p>The staff can delete, ban, do whatever they want with your account and your <br>
 submitted information. (Including exposing and logging your IP).</p>
 </li>
 <li>
 Do you agree to follow the server rules?<br>
 <select name="selected">
 <option value="0">Umh...</option>
 <option value="1">Yes.</option>
 <option value="2">No.</option>
 </select>
 </li>
 </ul>
	</html>

 <?php
 /* Form file */
 Token::create();
 ?>
	<html>
 <ul>
 <li>
 <input type="submit" value="Create Account">
 </li>
 </ul>
	</form>
	</div>
	</div>
<?php
}
include 'layout/overall/footer.php';
?>

	 

	Observação: o Html está misturado com códigos Php, peguei essa base por que estou aprendendo ainda a mexer com tudo isso.