As mentioned above, this isn't a new issue. For as long as I remember the game has issues when it comes to registering players. Players will get released, then re-signed, then released again, and then so on.
I'm assuming it's because the registration rules aren't as straight forward as other leagues. However, the frustrating thing is, is that this has been going on for a long time. You would think by now they would have had it fixed.