So.. did this and lost 400/570 followers.. is this normal?
It means that your old follow list was not posted to the relays you choose. You can add them back and try to repost it there. If it doesn't work, the relays you selected are not accepting your follow list. It might be too big for them.
as a relay dev i support this message https://i.imgflip.com/9860k2.jpg it's time for... i don't even remember teh name of the nip but it's time that lists were moved to a one small event per add/remove for follows, for relays, for mutes, for community memberships