In that case, it's not a "move". But a new account setup, unrelated to the existing old ones. The only relation between the 2 account being they have the same features and same billing info. Like someone having a home and a separate office.It was set up as 2 separate accounts and different start/end dates when I set it up. No phone service, I haven’t had a landline since 2001.
I moved often. Though fortunately or unfortunately, it was never with the same carrier. So no overlap, no mix ups.