It’s the other way around for me. Activated servers should be servers where your account is active (check your credit usage to confirm this), available servers should be those where you haven’t activated an account yet.
To deactivate any game world, log in to that game world and go to the options menu (the two cogged wheels) and select ‘deactivate game world’. I just tried it and the option is there even if no holding is present on that server, for that account.