The other costumes could be from the Halloween event or completing Mary’s role play events.
The relationship tab thing is because your save is from before the enhanced update which was version 0.6.5. There was a major overhaul of the game that changed most of the code so it was suggested to start a new save to prevent those kind of bugs.
If you don’t want to start over there is a save on patreon post for the public release or there is one on the discord server.