Two errors they made
One how would they have all those shoes at the end? Don't they repair the shoes and return them? Or do they keep them and give them identical ones back? I don't see how they could have kept them with the exception of occasionally saying the shoes got ruined and promising some compensation or something.
Two if all those shoes are for Adam Sandler to wear to look like people from his dad's time and his dad before him, wouldn't they all look like a bunch of bones since they've all been dead for so long? When he put on the shoes of the corpse or the mean black dude after he died, he was showing as if he were a zombie so wouldn't it be even worse for the shoes of his dad and his dad and so on?