Help With Tracking Price

[golfinggod]

Hi all
I am in the middle of creating a shopping site for a friend. Everything is going well except for one thing. For some reason when I have two items in a cart and one item is deleted the item itself is removed but the total still counts it as being there.

The Site in Question

An example:

Click to buy 10 "Brunello" and then return and buy 10 "Giraffe". Now go to the checkout and remove the 10 Brunello. You will notice that the cart still shows $24.

I have placed the two scripts below the first is the Checkout script and the second the Remove script.

Strangest thing is sometimes it actually works.

Checkout.php

// Make a MySQL Connection
mysql_connect("", "", "") or die(mysql_error());
mysql_select_db("db122078148") or die(mysql_error());



$item = $_POST["Name"];
$price = $_POST["Price"];
$quantity = $_POST["Quantity"];
$discount = $_POST["Discount"];
$catagory = $_POST["Catagory"];






// Check if cart is set
if(isset($_SESSION['cart']))
	{

// If item exists add 1 to quantity
if(array_key_exists($item,$_SESSION['cart']))
	{
	$_SESSION['cart'][$item][0] = $_SESSION['cart'][$item][0] + $quantity;
	}
	// If item does not exist create it
else
	{
	$_SESSION['cart'][$item] =  array($quantity,$price,$discount);
	}

}
// If not create cart 
else
	{

$_SESSION['cart'] = array( $item => array($quantity,$price,$discount));


}










//// Output the cart ///////////////////////////////////////////////////////////////

$totalcost = 0;
$cartitems = '';

foreach($_SESSION['cart'] as $key => $value) 

{


$id = $key ;

$q = $_SESSION['cart'][$id][0];

$p = $_SESSION['cart'][$id][1];

$d = $_SESSION['cart'][$id][2];



						if($_SESSION['cart'][$id][2] == 1)	
								{

									if ($_SESSION['cart'][$id][0] >= 5)
										{
											$div = floor($_SESSION['cart'][$id][0] / 5);
											$total = $div * 5;
											$total += ($_SESSION['cart'][$id][0] % 5) * $_SESSION['cart'][$id][1];

										}
									else {$total = $_SESSION['cart'][$id][0] * $_SESSION['cart'][$id][1];} 
								}
						if($_SESSION['cart'][$id][2] == 2)	
								{

									if ($_SESSION['cart'][$id][0] >= 5)
										{
											$div = floor($_SESSION['cart'][$id][0] / 5);
											$total = $div * 7;
											$total += ($_SESSION['cart'][$id][0] % 5) * $_SESSION['cart'][$id][1];

										}
									else {$total = $_SESSION['cart'][$id][0] * $_SESSION['cart'][$id][1];} 
								}
						if($_SESSION['cart'][$id][2] == 3)	
								{

									if ($_SESSION['cart'][$id][0] >= 5)
										{
											$div = floor($_SESSION['cart'][$id][0] / 5);
											$total = $div * 9;
											$total += ($_SESSION['cart'][$id][0] % 5) * $_SESSION['cart'][$id][1];

										}
									else {$total = $_SESSION['cart'][$id][0] * $_SESSION['cart'][$id][1];} 
								}


									$totalcosts = $totalcost + $total;

									$totalcost = number_format($totalcosts, 2);

									$cartitems = $cartitems.' '.$id.'-'.$q;




If($id != "")
	{
echo "<tr  >
       <td class=Details>$id</td>
       <td class=Details>$q</td>
       <td class=Details>&pound;$p</td>
       <td class=Details>$d</td>
       <td class=CartTitle><form name=form1 method=POST action=Remove.php>
       <input name=Submit type=submit class=CatSelectButton value=Remove>
       <input name=Id type=hidden id=Id value=$id>
       </form></td>
       <td>&nbsp;</td>
       </tr>";
	}
}

Remove.php

session_start();
   $item = $_POST["Id"];
   unset($_SESSION['cart'][$item]);
     header('Location: Checkout.php'); 

Please help anyone. I am a little behind schedule.

Thanks