in the WA_eCart/WA_Store_Cart_PHP.php file, find the folloowing:
if (isset($_POST[$this->CartName."_Quantity_list_".$n])) {
$itemQuantity = floatval($_POST[$this->CartName."_Quantity_list_".$n]);
}
if (isset($_POST[$this->CartName."_Quantity_".$n])) {
$itemQuantity = floatval($_POST[$this->CartName."_Quantity_".$n]);
}
if (isset($_POST[$this->CartName."_Quantity_check_".$n])) {
$itemQuantity = floatval($_POST[$this->CartName."_Quantity_check_".$n]);
}
and change it to:
if (isset($_POST[$this->CartName."_Quantity_list_".$n])) {
$itemQuantity = intval($_POST[$this->CartName."_Quantity_list_".$n]);
}
if (isset($_POST[$this->CartName."_Quantity_".$n])) {
$itemQuantity = intval($_POST[$this->CartName."_Quantity_".$n]);
}
if (isset($_POST[$this->CartName."_Quantity_check_".$n])) {
$itemQuantity = intval($_POST[$this->CartName."_Quantity_check_".$n]);
}