I have the same problem.
It is not the receiver but the signal being sent by the station.
I live in Hillbilly haven NY and our local station, both radio and tv, must be run by the same moron. Some commercials, the local commercials, are very loud...thank God for "mute" while others are normal. Our local radio station is much worse...two commercials, one local another apparently national, running over each other at the same time...several minutes of dead air when going to a syndicated show from local programming.
I believe it is the individuals "running the boards"...ever see the monkey commercial with their laser pens, etc. Those are the same individuals running the boards in my town lol.
I was very spoiled living in the Boston area but did not realize it until moving to Hillbilly ville hehehe.