I got my (single) HDPVR to show up, expand, etc, and it appears at first I can do manual time-shifting, although I noticed doing a manual record that it produces a .ts file that is zero bytes in size, so I'm not sure what's up there.
Actually I experienced that a few times when I was testing WildE's builds.
I think the last time it worked successfully I would just have to start using it from MP client.
Testing from Server controller would do what you just described, but client was fine if I didn't go to manual control at all...