refresh หรือเปลี่ยนหน้าแล้วค่า session เพี้ยน ไปดึงค่าของสมาชิกคนอื่นแทน เป็นเพราะอะไรครับ

<?
	$objConnect = mysql_connect("localhost","xxx","xxx") or die("Error Connect to Database");
	$objDB = mysql_select_db("xxx_member");
		$strSQL = "SELECT * FROM member_thai WHERE member_id = '".$_SESSION['member_id']."' ";
		$objQuery = mysql_query($strSQL) or die ("Error Query [".$strSQL."]");
		$objResult = mysql_fetch_array($objQuery);
	?>

<? session_start();?>
<?php
	mysql_connect("localhost","xxx","xxx");
	mysql_select_db("xxx");
	$strSQL = "SELECT * FROM member WHERE user= '".trim($_POST['user'])."' 
	and password = '".trim($_POST['password'])."' AND active = '1' ";
	$objQuery = mysql_query($strSQL);
	$objResult = mysql_fetch_array($objQuery);
	if(!$objResult)
	{
	echo "<meta http-equiv='Content-Type' content='text/html; charset=utf-8' />";
				echo "<script>alert('คุณใส่ข้อมูลเข้าใช้ไม่ถูกต้อง กรุณากลับไปแก้ไขอีกครั้ง หรือติดต่อทีมงานหากยังไม่สามารถเข้าใช้งานได้');</script>";
	echo "<script>javascript:history.back();</script>"; 
	}
	else
	{
			$_SESSION["member_id"] = $objResult["member_id"];
			$_SESSION["status"] = $objResult["status"];
			$_SESSION["a_status"] = $objResult["a_status"];
			$_SESSION["user"] = $objResult["user"];
			$_SESSION["company"] = $objResult["company"];
			$_SESSION["name"] = $objResult["name"];
		$_SESSION["email"] = $objResult["email"];
		$_SESSION["pro_complete"] = $objResult["pro_complete"];
		$_SESSION["photo"] = $objResult["photo"];

			session_write_close();
			
			if($objResult["status"] == "Employer")
			{
echo "<meta http-equiv='refresh' content='1; url=er.php'>" ;
exit() ;
			}
			else
			{

echo "<meta http-equiv='refresh' content='1; url=eyet.php'>" ;
exit() ;
		
			}
	}
	mysql_close();
?>

<? session_start(); ?>
<?

if($_SESSION["lang"] == "EN")
{
	include("../en.php");
}
else
{
	include("../th.php");
}
?>


<?
	
	if($_SESSION['member_id'] == "")
	{
	echo "<meta http-equiv='Content-Type' content='text/html; charset=utf-8' />";
		echo "<script>alert('Sorry you are not yet login ขออภัย คุณยังไม่ได้ Login ค่ะ')</script>"; 
echo "<meta http-equiv='refresh' content='2; url=../index.php'>" ;
exit() ;
	}


	if($_SESSION['status'] != "JS")
	{
	echo "<meta http-equiv='Content-Type' content='text/html; charset=utf-8' />";
	echo "<script>alert('Sorry you are in the wrong section ')</script>"; 
echo "<meta http-equiv='refresh' content='2; url=../index.php'>" ;
exit() ;
	}	
	
include("../config.inc.php") ;
mysql_query("SET NAMES UTF8"); 
	$strSQL = "SELECT * FROM member  WHERE member_id = '".$_SESSION['member_id']."' ";
	$objQuery = mysql_query($strSQL);
	$objResult = mysql_fetch_array($objQuery);
?>