I just got Dish Network installed today and trying to figure all this stuff out. So the receiver is in my room since I will be the one using it 90% of the time. The 2nd TV is in the living room downstairs and I never watch there, but my parents might watch 2-3 hours at night. I record a lot of shows, so would it be better to use single or dual mode? I'm not 100% sure what the difference between these two are. Can someone please help?