I'm lost as well so I'll start over on this new thread since this problem is a different problem for the original posting. See if I can explain this better.
Looking at screenshot below from link (page) http://imaginative3d.com/product/test-product-1/ you can see the problem next to the product picture. Any thoughts why this is happening? As far as the screen width. I really not sure what you want. It's the default template width from the template.