I don't mean to hijack the thread, but what about Harmony remotes not working with the 622? I have a Harmony 720 I think - it's a rectangular shape rather than the hourglass shape - and anyway, the Harmony website keeps telling me that it can't support the use of the "DVR" button. I can get the Harmony to do anything I want, but if I want to watch one of my recorded shows, I have to grab the Dish remote to hit the DVR button, or I could go through the menu button - what a pain.
Not sure about the 720, but the 880 works fine with my 622. Only thing though, is that the remote was originally programmed for a 942. When I got the 622, everything worked, so I never reprogrammed it.
IIRC, even with the 942, if I set the button to "DVR" nothing would work, but when I looked thru all available button functions, one was called "PVR" and that did the trick, so you might want to try the same.