Remove thumbnail on product page in MarketPress

I have created product pages, but I cannot remove the thumbnails from the product pages. Even if I tell it to not display thumbnails in the settings, they still show up on the product page. For example, here is a product page that has the main image displayed, but also has a thumbnail right next to it. I dont' want the same photo displayed twice... how do I remove the thumbnail?

http://www.prairiegoods.com/store/products/wallet/