Hi Jim,
Please be sure to use our recommended Add to Cart/View Cart buttons instead of the PayPal Shopping Cart buttons. This is a known issue with the PayPal Shopping Cart buttons that can't be fixed, so we plan on removing the option to use those buttons in the near future. Our recommended cart buttons will still work with your PayPal account, and there are no longer any advantages to linking to PayPal's cart directly, just bugs like these.