The Auctiva store is a free service to you, unlike an eBay store. You can choose your colors, template, contact info, blog, etc. and add the text you'd like. It's really quite nice... just another great thing about Auctiva.
Your pictures should be showing in your Auctiva storefront and in the gallery. It sounds like you've done it correctly.
I would do as Choo suggests and file a support request with Auctiva. They can help you figure out exactly what's going on and be sure all is set up properly since they can see all that stuff back there.
