find this line:
if ($itemQuantity > 0) {
$this->Items[] = new wholesaleCart_ItemDefinition($itemID, $itemName, $itemDescription, $itemThumbnail, $itemWeight, $itemQuantity, $itemPrice, $itemS, $itemM, $itemL, $itemXL, $itemXXL, $itemXXXL, $itemSinglePrice, $itemOS, $itemSM, $itemML, $itemp24, $itemp26, $itemp28, $itemp30, $itemp32, $itemstyleNo, $itemcolors, $itemXL2);
}
and change it to:
if ($itemQuantity > 0) {
array_unshift($this->Items, new wholesaleCart_ItemDefinition($itemID, $itemName, $itemDescription, $itemThumbnail, $itemWeight, $itemQuantity, $itemPrice, $itemS, $itemM, $itemL, $itemXL, $itemXXL, $itemXXXL, $itemSinglePrice, $itemOS, $itemSM, $itemML, $itemp24, $itemp26, $itemp28, $itemp30, $itemp32, $itemstyleNo, $itemcolors, $itemXL2));
}
NOTE: if you make any changes to the eCart object, this code change will be undone and will need to be reapplied.