I had the same problem. You are hearing the cable b'c you have your receiver set to the same audio channel as your TV -> cab/sat probably. What I had to do was to buy an additional optical audio cable (quite inexpensive) and connect that from your tv to your receiver. Then you have to change your receiver's input from cab/sat to another input that matches where the optical cable is plugged into (try the other input buttons on your receiver until you hear the correct audio!)
Good Luck