If you configure a product to have AllowedQuantities, the 'ADD TO CART' button does not add the item to the cart from the home and category pages. It simply acts as a link to the product page and takes you there.
I've searched these forums and haven't found a working solution to this. Has anyone been able to solve this?
What version on nopCommerce ? Are you using a Theme ? If yes, as a test you could try and switch back to DefaultClean theme in settings and check if you still have an issue If there is no problem using DefaultClean then contact the Theme developer for support