I need help with my account

Brooo.... i got logged out of my spacehey acc which is also named STD (and has the shiho pfp) i literally used the exact same password and user for the other account ans it somehow said It doesn't exist even tho it still does? I literally created a whole new account with the same password and user as my old acc which shouldn't be possible. Anyone know how to fix this? I know im Not really on here as much but I really want to go back.