Thanks!

I found this tool for fixing your contact lists: https://metadata.nostr.com/ You could also try https://nostrsync.live/

With different clients the possibility is there you're connected to different relays each (they also load in different orders). It depens on how a client has implemented this. So this may lead to those differences when you view your data. My DMs, numbers of followers also are always different when I compare them in a client. Part of the design of Nostr: there is no single source of truth.