I have a 625 set up in single mode. When it was installed approx 1 yr ago, it would record to tv2, and indicate same on front of unit. A few months ago I noticed tv1 would be lit up instead of tv2. As far as I can tell it's recording on tv2, and all other menus indicate that the recording is on tv2. Dish sent me a replacement reciever, and it does the same thing. Any ideas. Thanks.