PAYPAL doesn't like it when their site opens up in my browser. It needs to be a completely different window with their URL, and I didn't realize that when I re-designed the site earlier this year. I have changed the links on the main page and catalog page, but not all the links have been updated to open a new window when taken to my shopping cart to checkout.
When ordering, add the desired products to your cart, go back to the main page, and click on the "shopping cart" link in the header. That should solve the problem. If not, contact me and we'll find a different solution.
Thanks, Jheff