product does not show up in the cart

actually I have 2 issues.
Using marketpress, and when i as the admin add a new shop, it doesn't show the global product categories so that when I add products I can choose from a list of predefined categories.

How can set that up?

The second issue is that the new products I am adding in the new shop do not show up in the users cart after they click Add To Cart or Buy Now.
http://thehandmadechannel.tv/shops/

If you choose the silver earrings, they don't add to cart properly.