I cleared both caches, and cleared browser cache, even went to a different computer for the first time.
http://scoopmasters.com/buy-dogipot-products/pet-waste-stations. It looks like the css made room for the new button size as the bags are now a little to the left from where they were. I downloaded the small.png file just to make sure and it is the add to cart button. I'm sure it's something simple and stupid that I'm overlooking.