There are normally shipping and billing details that are sent to PayPal. Are you getting either one of these sets of details showing? Perhaps a screen shot or a link to the site where this can be seen would help. If I can understand what info is missing we can take a look at your checkout pages to determine what the cause might be. Please post back with this info and a copy of your checkout page that you updated minus any of the sensitive details so we can take a look at it.