- if ($check = check_negative_stock($ln_itm->stock_id, -$ln_itm->qty_dispatched, $_POST['Location'], $_POST['DispatchDate']))
+ if ($check = check_negative_stock($ln_itm->stock_id, $ln_itm->qty_done-$ln_itm->qty_dispatched, $_POST['Location'], $_POST['DispatchDate']))