I'm validating some input, and between using sessions and a header to redirect to my index, all of the content is being doubled. For example, see http://ggserver.dyndns-server.com/ and press send comment without filling out information. Everything on the index page doubles and I can't figure out why.

In the index.php file
PHP Code:
<?php     session_start();  ?>

<html> 
    <script type="text/javascript" src="functions.js"></script>
    
    <head>
    <link rel="stylesheet" type="text/css" href="style.css" />
    <title> PolyView </title>
</head>


<body onload="javascipt:ajax('stream.php','tmp_post','POST');">

   

<h1>
    <a href = "index.php">
    <img src="/images/header.png" alt="PolyView Banner" id="banner" />
    </a>
    
    
</h1>
<h1>
    Welcome to PolyView <br/>  
</h1>

<?php include "menu.php"?>

<br/> <p id="tmp_post"></p> <br/>

<?php
    
if( isset($_SESSION['ERRMSG_ARR']) && is_array($_SESSION['ERRMSG_ARR']) && count($_SESSION['ERRMSG_ARR']) >) {
        echo 
'<ul class="err">';
        foreach(
$_SESSION['ERRMSG_ARR'] as $msg) {
            echo 
'<li>',$msg,'</li>'
                        echo 
'<br>';
        }
        echo 
'</ul>';
        unset(
$_SESSION['ERRMSG_ARR']);
    }
?>

<p class="pos_fixed">
    Issue:<br/>
    <select id="issue">
        <option value=5>Obama</option>
        <option value=6>Healthcare</option>
    </select>
    <br/>
    Title: <br/>
    <input type="text" name="title" id="title"/> <br/>
    Comment: </br>
    <textarea name = "content" id="content" rows="10" cols="50">
    </textarea>
    <br/>
    <input type="submit" value="Send Comment" onclick= "insert_into_issuePosts()" />

    
</p>    

</body>
</html>
In the insert_into_issues.php file
PHP Code:
<?php

session_start
();

require_once(
'config.php');

//Array to store validation errors
$errmsg_arr = array();

//Validation error flag
$errflag false;

//Function to sanitize values received from the form. Prevents SQL injection
function clean($str) {
        
$str = @trim($str);
        if(
get_magic_quotes_gpc()) {
                
$str stripslashes($str);
        }
        return 
mysql_real_escape_string($str);
}

//Sanitize the POST values
$title clean($_GET['title']);
$content clean($_GET['content']);

//Input Validations
if($title == '') {
        
$errmsg_arr[] = 'Title missing';
        
$errflag true;
}
if(
$content == '') {
        
$errmsg_arr[] = 'Content missing';
        
$errflag true;
}


//If there are input validations, redirect back to index.php
if($errflag) {
        
$_SESSION['ERRMSG_ARR'] = $errmsg_arr;
        
session_write_close();
        
header("location: index.php");
        exit();
}



$con mysql_connect(DB_HOST,DB_USER,DB_PASSWORD);
if (!
$con)
  {
  die(
'Could not connect: ' mysql_error());
  }

mysql_select_db(DB_DATABASE$con);

//$issueID = mysql_query("SELECT id FROM issueCategories where title =" . '$_GET[issue]');
$sql="INSERT INTO issuePosts (title,content,issueID)
VALUES
('$title','$content','$_GET[issueID]')"
;


if (!
mysql_query($sql,$con))
  {
  die(
'Error: ' mysql_error());
  }

$result mysql_query("SELECT * FROM issuePosts ORDER BY id DESC");

while(
$row mysql_fetch_array($result))
{
  echo 
"<p class = 'center'>";
  
$issue mysql_query("Select title FROM issueCategories where id = " $row['issueID']);
  echo 
"On " mysql_result($issue,0);
  echo 
"<br/>";
  echo  
$row['title'];
  echo 
"<br/>";
  echo  
mysql_query("Select title FROM users where id = " $row['userID']);
  echo 
"<br/>";
  echo  
$row['content'];
  echo 
"<br/> <br/>";
  echo 
"</p>";
}

mysql_close($con);

    
?>
Any ideas? Thanks a ton.