Should your module work with the stock module? I'm using it in a fabric website that sells quantities in half metres. I've implemented stock functionality using the out of stock notification module which all seems to work well with the half metre functionality up until I click review order in the checkout page. As an example, if my current stock of a particular fabric is 3 metres and I have 3 metres in my basket when I click review order I get an error message saying that only 3 units are in stock but I have 6 units in my shopping cart. The system requires 6 half metre units to complete the order.
Have I done anything wrong? Can you provide any support on this matter please?
Thanks in advance.