Product listing layout for Marketpress

I've recently installed Marketpress on my website. I have products listed and I used a shortcode [mp_product_grid] to try and get a grid look for the products. When I did that it does not line them up correctly and I also have the original layout available from the Classic Layout still appearing. How do I remove the classic layout and get these to line up correctly. The add to cart button is also not appearing correctly after installing Marketpress. How do I correct this?

A link to my product page on my site is
Living for Bargains Product Page

Thanks!