Dish says it's a bug
After more calls today, I was told there is a problem with the 625 and ID, but only on some of them, and it affects other receivers on the network. They think it's a s/w issue, and they hope to have it fixed within two weeks. Also, they have no way of knowing which ones work and which don't until they are tried. Sure wish they'd told me that sooner, I could have saved myself lots of time rewiring and troubleshooting.
The unit also has a quirk where if an episode is set on Dish Pass to record, and I check the Info, decide I've seen it, click Skip, a later showing then is put in the schedule. Then, I Skip that one. The last couple of nights when I did this, it decides to reboot after doing this a few times. Kind of annoying... This must be another s/w bug.