well, that shit happens to everyone sometimes. I like having the 'submit' button as a safety. On other sites, it regesters a move as soon as you drag the piece...and on those sites I have lost more games because I realized at the last second my error. With this site, I make a move, look at it, chew on it, then submit or cancel.
Do not feel very bad about this. Everyone makes mistakes. It is part of being human. Sometimes, you suddently start making blunders like this a lot for some reason and get into a losing streak. I have been in one for like 1 week+. If you think that you are getting into one of these, I suggest that you either take a break from chess for a tiny bit or just keep playing and try your best.
yeah i had a backwards game where i sacrificed my queen for a checkmate and then just made a move in the wrong order and ended up losing my bishop ahhh if i only i recorded games with my dad they are always exciting.
I'm back to my old self it seems :(... a total brain fart... I had a brilliant idea but tried to execute it backwards :P.