Smokem review for Preorder Wolf | Pre order now

I applaud the fact that this is a free app (at least when we trialled it), but we discovered a bit of a show-stopper when using themes that allow you to add products from outside of the actual product page - for example themes that allow you to add an item from a thumbnail on a home page or collection page. If a customer does this to a product with zero inventory it still allows the product to be added to cart without idenitifying as a pre-order. So the customer thinks they're ordering something that's in stock! Raised this with them, and no answer after 30 hours. I'll be uninstalling. Shame as it looked promising...