Uh, huh. First step: How are your satellite antenna lines grounded where they enter your home? It's possible that the radio station signal is being introduced into the phone lines through the modems in the receivers, as opposed to being picked up directly by your house phone wiring. This could happen if the improperly grounded shield of the satellite antenna lines are acting as a radio antenna. It would be a worthwhile experiment to see if you have this problem with both receivers connected to the AC and the telephone lines, but with all the antenna lines disconnected from them at the BBC's. If the problem goes away, we'll need to work on your antenna line grounding.
Next step if you still have the problem: Just to make sure this is not simply a grounding problem at the receiver, get a small length of any small diameter wire and connect it between the receivers and the screw on a nearby electrical outlet wall plate. You may have to wrap the receiver end of the wire around the F connector on one of the SAT IN jacks.
If this problem continues with no antenna lines connected to the DirecTV receivers and the receivers grounded at the electrical outlets, it points more to your phone lines. Telco's have filters to remove RF signals from their lines. I used to know the part number from the Bell System Practices Manual that BellSouth used, but that was long ago. You'd have to call the telco repair service and tell them you're hearing a local radio station on your telephone. They know what to do from there.