Ok, here we go.
start.php
Just shop a shirt :-) checkout redirects you to the login.
username: webassist@denis-online.de
password: webassist
As, you can see, the page restrict does not work, too. Cause after login, auto and confirm is 0.
Then checkout and on the Paypal page there is no information about the shopping.
attached is the checkout folder.
Denis