Some of my purchases were successful on eBay and they appear as paid. After having multiple errors of the (10417) one it was successful to pay and said 'Thank you for your payment'. I went on my Paypal account and everything but they're not marked as paid.
Tried a second time (again after multiple errors) and it told me 'Thanks for you payment ...) again, same thing not marked as paid and no transactions recorded. Just to be on the safe side, could duplicate payments happen? I'm afraid that later 2 payments will be sent for this 1 item, don't know it it's possible.