Marketpress Lite Checkout Problems

I’m having trouble configuring the checkout with Marketpress Lite. I have Paypal express selected as my payment option, but there seem to be so many glitches in the checkout process…

Here is my store homepage http://wild-for-herbs.com/store/
See how weird this page looks: http://wild-for-herbs.com/store/shopping-cart/

The whole checkout process is rough and I have noooo idea how to fix it!

Thanks to anyone who can give me a heads up 🙂