Items Not Showing Up

I a instance of woocommerce running and not all of my items are showing. I have set the # of posts to 300. There are only 35 products and only 20 of them show. I also noticed that only 2 items per row are showing when 3 were showing last week. I looked at the html code and noticed that every fourth item has the class “last” assigned to it instead of the third item.

http://wordpress.org/extend/plugins/woocommerce/