When the time comes to give the breakdown of Andy's escape from the prison, he leaves his worn shoes in the warden's box of the supposed newly shined shoes, but while Andy is climbing down the pipe to get to the sewage pipe, as the lightning strikes, you can clearly see that he is wearing the issued prison shoes and not the warden's. Also, how are we supposed to believe that supposing he did wear the warden's shoes, how could he presentably wear them into the bank later that morning?