[tgr]

I've come up with a solution. It seems that Xcart adds some inline styles to the products-list, one of which is a z-index. It starts with 3 and counts down, so the 5th item in the product list has a z-index: -1 and does not display. I looked for the snippet of code that assigns the z-index in the products-list.tpl and the products.tpl, but was unable to locate. I ended up having to put a larger negative z-index on the body and the page container to make the complete product list visible.