Buy This Item, We don't Have It

So, this morning I came in at 8:30. Among the typical morning activities, I had to take 91 items and set them up on the website so they aren't in stock. Basically, they were set to limitless, and we never had them. We ordered most of them in Jan, and they never came, yet we were telling customers we had them and were happy to take their money. What is scary is we have 60,000 SKU's, and I am willing to bet more than 65% of them we don't have, but they are set to limitless, showing IN STOCK on the websites.