Generally, you do not need multiple accounts on different lemmy servers. You can “use” the other servers with one account. And, that you have multiple different servers, is by design.
Or are you referring to defederation, when you are writing about “seperation”?
I just want to say that you have invested the 2h not only for Lemmy. It took me minutes for this account because I was already familiar with the Fediverse. If you want to switch within the Fediverse in the future, I’m sure it will be easy for you•