I went to bed and it appears it finally downloaded the advanced guide sometime overnight.
There's an issue with locals that the OTA module (AM21) receive - their mapping gets mixed up at times. When I go to the guide, it lists KTVD-DT which is on 20-1 onto 41-1 and then it goes back to normal when you check the guide later. Other channels (OTA) get mixed up like that as well but then they go back to where they are supposed to be when you check the guide again later. Pretty weird...
I plan on putting the receiver through its paces once the wife gets done watching the Dog Show on Animal Planet tonight