My THD is gettings its stuff OTA. In NYC market, it shows the right guide info for 7,1 , 7,2 and 7,3, but when I try to tune to 7,1, I actually get 7,2, the 7,2 gets me 7,3 and 7,3 just gives me a blank screen. 7,1 is nowhere to be found. I've rerun channel scans and guided set-up many times and the problem persits... any ides?