Strange product behavior

I was wondering if anyone had ideas on how to correct some strange product behavior I have been experiencing. I added several sizes to an existing product, rebuilt the inventory, and placed the product in a block on our home page to promote it. It now shows the item as Out Of Stock on the home page and in my history of recently viewed items, but when clicked through to the product page it is available to purchase. The drop menu for size on the product page defaults to the bottom and is organized differently than the other products. Any suggestions are greatly appreciated.

I have also had troubles lately with product thumbnails getting wildly distorted, but that is probably best for another post.

Thanks in advance for the help.

Have you tried clearing the cache?

I did clear my cache, and still have the same issue.