Pro Sites Confusing Checkout

Hi,

In testing a Pro Sites installation, feedback from users is that the checkout process is very confusing. For example, after submitting their credit card information, there is no confirmation, no "Thank You" page, none of the normal things that people expect to see when they have ordered something with a credit or debit card. Am I missing something? Is there any way to add a confirmation message or "Thank You" page?

Thanks,

Mark