Yes it all should stay deleted and that fact that it is popping up again is definitely a bad thing and shows we aren't properly deleting stuff. We have been struggling with our server side accounts (supabase) in the last days trying to debug a lot. This particular error seems to be happening when the client side tries to sync with the server side and vice versa. Just to be clear, you have a server side account with us (you have an email-attached account), correct?
We are on it and thanks for reporting.