Need to Frequently Reset Dish Network HD VIP 612 Solo DVR.

When you bring up your guide look at the top of the screen and you will see the LIST: if this says ALL HD then press the guide button until you see ALL SUB or a menu and select ALL SUB. If your guide keeps changing by itself its possible to have remote interfence since you have a UHF remote, especially if you also see channel changes as well. Try setting the guide and go from there. If you still continue to have issues call 1-800-333-3474 for tech support for extensive troubleshooting or at dishnetwork .com/tech.