Just recently renewed a Premium subscription and given the devices allowance I decided to add a couple of systems. Started out with 3 devices. Installed number 4 on a system I use for Golf Sim and it came right up in Central, no prob.
Installed it on one I had in my workshop that I use for searches and one of my other systems, a music workstation, promptly dropped off Central, replaced by the workshop system. Thought it might just be a case of an issue with that workshop system so I re-installed a new clean Windows and BD on that system, changed the computer name on the music workstation, and reinstalled BD on that machine. And it did change. Now the golf sim machine drops off instead.
BD support has been pretty much useless. You can write them a detailed commentary and they respond with questions where the answers are right in what you sent then to begin with. And with suggestions like, enter them in a different subscription and see if that works.
Curious if anyone else has seen this? My sense is that there's something hosed in the database they use to track systems and they don't seem all that eager to look at that. Trying to cover the bases before I just file a Paypal dispute.