I put up auctions for gold buyout/bid and I got silver in the mailbox

Am I crazy? I vividly remember putting up certain items for several gold but I wake up and see I got silver out of it… This happen to me on 1item and I thought I messed up- but now I see it has happened to me on another and there is no way I made that mistake.

Has this happened to anyone else? I could just be going a little crazy but idk…

What starting bid did you post with it?