You know what, I just had this problem yesterday, and then it all started working again as fast as it stopped. I never did figure it out but was too busy to deal with it besides making sure remotes didn't get disabled and all that. It still has me scratching my head.
I thought it was just something stupid that I was missing due to hurrying, because I was so busy. I just figured I would deal with it later, but then when I went to fix it, everything was working perfectly. It was very strange.