ระบบ login ของผมมันเปลี่ยน แอคเคาท์เองอะคับทำไงดี ต้องแก้ยังไงคับ

<?php
session_start();
require_once "include/connectdb.php";
		$sql = "SELECT * FROM useradmin WHERE userid ='".$_POST[userid]."' and password='".$_POST[password]."'";
		$dbquery = mysql_db_query($db, $sql); 
		$num_rows = mysql_num_rows($dbquery);
		$rowLogin = mysql_fetch_array($dbquery);
		$redirect = $rowLogin[redirect];
		if($num_rows == 1){ 
		   if ($redirect == "ADMIN")
		   {
			$_SESSION['userid'] = $rowLogin['userid'];
			echo "<meta http-equiv='refresh' content='0;URL=AdminIndex.php'>";
		   }else if ($redirect == "ENDORSEE")
		   {
			$_SESSION['userid'] = $rowLogin['userid'];
			echo "<meta http-equiv='refresh' content='0;URL=HeadIndex.php'>";
			 }else if ($redirect == "STAFF")
		   {
			$_SESSION['userid'] = $rowLogin['userid'];
			echo "<meta http-equiv='refresh' content='0;URL=StaffIndex.php'>";
		   }else if ($redirect == "USER")
		   {
			$_SESSION['userid'] = $rowLogin['userid'];
			echo "<meta http-equiv='refresh' content='0;URL=UserIndex.php'>";
		   }
		}else{ 
			echo "<meta http-equiv='Content-Type' content='text/html; charset=tis-620' />";
			echo "<script language='javascript'>alert('ชื่อหรือรหัสผ่านไม่ถูกต้อง กรุณาตรวจสอบอีกครั้ง');</script>";
			echo "<meta http-equiv='refresh' content='0;URL=index.php'>";
		}
	
?>

<?php
session_start();
require_once "include/connectdb.php";
		$sql = "SELECT * FROM useradmin WHERE userid ='".$_POST[userid]."' and password='".$_POST[password]."'";
		$dbquery = mysql_db_query($db, $sql); 
		$num_rows = mysql_num_rows($dbquery);
		$rowLogin = mysql_fetch_array($dbquery);
		//$redirect = $rowLogin[redirect];
		$redirect = $rowLogin["redirect"];// ==>อย่างนี้ดีกว่านะ
		$_SESSION['userid'] = $rowLogin['userid'];// ==> ประกาศไว้แล้วเรียกใช้ที่ปลายทางน่าจะดีกว่านะครับ
		if($num_rows == 1){ 
		   if ($redirect == "ADMIN")
		   {
			//$_SESSION['userid'] = $rowLogin['userid'];
			echo "<meta http-equiv='refresh' content='0;URL=AdminIndex.php'>";
		   }else if ($redirect == "ENDORSEE")
		   {
			//$_SESSION['userid'] = $rowLogin['userid'];
			echo "<meta http-equiv='refresh' content='0;URL=HeadIndex.php'>";
			 }else if ($redirect == "STAFF")
		   {
			//$_SESSION['userid'] = $rowLogin['userid'];
			echo "<meta http-equiv='refresh' content='0;URL=StaffIndex.php'>";
		   }else if ($redirect == "USER")
		   {
			//$_SESSION['userid'] = $rowLogin['userid'];
			echo "<meta http-equiv='refresh' content='0;URL=UserIndex.php'>";
		   }
		}else{ 
			echo "<meta http-equiv='Content-Type' content='text/html; charset=tis-620' />";
			echo "<script language='javascript'>alert('ชื่อหรือรหัสผ่านไม่ถูกต้อง กรุณาตรวจสอบอีกครั้ง');</script>";
			echo "<meta http-equiv='refresh' content='0;URL=index.php'>";
		}
	
?>