สอบถามปัญหาผม query ข้อมูลมาแต่พอ while แล้วข้อมูลมันลงไม่ตรงกับตารางที่กำหนดอ่ะครับ ช่วยดูให้ที

<link href="../style.css" rel="stylesheet" type="text/css">
<?php
	session_start();
	
	$sql = "SELECT sp_stock_import.part_id , sp_stock_import.part_name , sp_type.id_type , SUM(amount) AS Amount ";
	$sql .= "FROM sp_stock_import ";
	$sql .= "INNER JOIN sp_stock_list ON sp_stock_list.part_id = sp_stock_import.part_id ";
	$sql .= "INNER JOIN sp_type ON sp_type.id_type = sp_stock_list.id_type ";
	$sql .= "GROUP BY sp_stock_list.part_id, sp_stock_import.part_name, sp_type.id_type";
	
	$result = mysql_db_query($dbname,$sql);
	
	if($_SESSION["username"]=='')
	{
?>
<form id="center" name="form1" method="post" action="warehouse/db_connect.php">

    <table width="200" border="0" align="center" style="margin-top:60px;">
      <tr>
      	<td colspan="2" align="center" height="40">Staff Login</td>
      </tr>
      <tr>
        <td>User ID</td>
        <td><input type="text" name="tb_username" id="textfield" /></td>
      </tr>
      <tr>
        <td>Password</td>
        <td><input type="password" name="tb_password" id="textfield2" /></td>
      </tr>
      <tr>
        <td colspan="2" align="center" height="30"><input type="submit" name="bt_submit" id="bt_submit" value="Submit" /></td>
        <input type="hidden" name="swap" id="swap" value="1" />
      </tr>
    </table>
</form>
<?
	}
	else
	{
?>
<div class="date" style="margin-top:-12px;"><?=$_SESSION["username"]?>  <img src="images/27-May-13 9-38-30 AM.png" height="25" width="25" /><a href="warehouse/test3.php">Warehouse</a>  <img src="images/Apps-session-logout-icon.png" height="25" width="25" /><a href="warehouse/logout.php">Logout</a></div>
<table align="center" width="80%" height="130px" border="0" style="margin-top:10px;">
<?
	$sql = "SELECT * FROM sp_type";
	$qr = mysql_query($sql);
	while($rs2 = mysql_fetch_array($qr))
	{
?>
<tr>
  <td colspan="2" align="center" style="font-family:'Times New Roman', Times, serif; font-size:16px; color:blue; border-bottom:1px solid #bbbbbb; padding-bottom:2px;"><?=$rs2[name_type];?></td>
<tr>
	<?
		if($_SESSION["lang"]!="th")
		{
			echo'
    		<td align="left" style="color:black;">Product Name</td>
		    <td align="left" style="color:black;">Amount</td>
			';
		}
		else
		{
			echo'
    		<td align="left" style="color:black;">ชื่อสินค้า</td>
		    <td align="left" style="color:black;">จำนวน</td>
			';
		}
	?>
</tr>
<?
	while($rs=mysql_fetch_assoc($result)) 
	{
		$variable1 = $rs["part_id"];
		$variable2 = $rs["part_name"];
		$variable3 = $rs["Amount"];
		if($rs[id_type]==$rs2[id_type])
		{
?>
<tr>
    <td align="left" style="border-bottom:1px dotted #bbbbbb; padding-bottom:2px; font-style:italic"><? echo $variable2; ?></td>
    <td align="left" style="border-bottom:1px dotted #bbbbbb; padding-bottom:2px; font-style:italic"><? echo $variable3; ?></td>
</tr>	
<?
		}
		else
		{
?>
<tr>
    <td colspan="2" align="center" style="border-bottom:1px dotted #bbbbbb; padding-bottom:2px; font-style:italic">No Product Available</td>
</tr>	
<?
		}
	}
?>
</tr>
<?
	} 
	mysql_free_result($result);
?>
</table>
<? } ?>