If he didn't break into your account It might possibly be hacker. Try the two-factor authentication as it Keeps you account safe and secure. And please change your password
@MohammadAayanKhan as if a hacker gets hold of your password, well he may be the one to change it. It looks like that your account has been hacked and you have to take proper care of that. As 'the' moderator hasn't broken into you account, The most possible option is that you account has been hacked so I advice you to follow my advice. A few other possibilities are you could have added a the 25 teams yourself and forgotten, which is not so probable.
But, In my opinion moderators CAN break into your account as when you register, The Lichess developers receive your username AND password as you are registering on their site. So moderators probably can break into your account WITHOUT (Or with) your permission as correctly stated by #5 (
@FuriousArjun). But Yes, what #32 (
@wvwvwvw) might be possible too, when you consider it for a while...