Amai PreOrder Manager + Notify

At first it was working great, but then it started selling out of stock products to customers without notifying them that they were pre-orders. I had quite a few orders go through right before the holidays and the customers were not happy when they found out that they wouldn't be ready in time for Christmas, because they thought the items they purchased were in stock. I checked everything to make sure the preorder manager and my inventory were properly installed. I really wish it worked reliably, because it's easy to use and customize, but it just isn't reliable and it caused damage to my brand.