We have a website that is having an issue with adding to cart on zen cart 1.54. For example, we have 3 part numbers, D336-R, D336-B, D336-L. Customer does not know this. So they type in D336 in the search bar and of course, all 3 part numbers show up in the results. The customer now has the option to type in the QTY field what they want. If you type in a quantity like 1 and hit "add to cart", it does not work.