SIDES CUT OFF SCREEN

I HAVE 3 TV'S AND 3 RECEIVERS IN MY HOUSE. 2 RECEIVERS ARE HD, HOWEVER ONLY ONE OF THEM IS HOOKED UP TO A HD TV (HD TV WITH HD RECEIVER IS FINE AND WORKS GREAT). THE HR10-250 IS HOOKED UP TO A NON HD  60 INCH TV. PROBLEM, THE LOCAL CHANNELS (CBS/NBC/FOX) GET CHOPPED ON THE SIDES. THE LEFT AND RIGHT ARE CUT OFF, I CANNOT SEE THE SCORE OF THE GAMES WHEN THE SCORE IN ON THE BOTTOM LEFT OR RIGHT. IT IS INTERESTING BECAUSE ALL THE OTHER CHANNELS ARE FINE.

MY THIRD TV WHICH IS NOT A HD TV AND A NON HD RECEIVER HAS THE SAME PROBLEM, ONLY THE LOCAL CHANNELS ARE CUT OFF.

I HAVE CALLED DIRECT TV 3 TIMES AND THEY TELL ME ITS A TV PROBLEM, NOT SURE. I HAVE TRIED TO FIX EVERYTHING AND NOTHING WORKS, PLEASE HELP.