I tried the Live Chat suggestion and not only did "reset the port mappings for remote DVR" not fix my problem, the agent somehow managed to remove my DVR from my account!
Since I'm at work now, I can't even tell what the status is. I am fearful.
I also was Bad Gateway, but only on Favorites 1 and 2. Total listings was OK. Went to Online Chat a few moments ago with the problem. Agent Abbrahim (SP?) remapped the ports in less than 30 seconds. Note however I was logged in Vz.com rather than Vz.net, the latter being where such is managed.