When the FCC and the federal government removed the rules for how many stations one company could own in a given market, that opened up a big can of worms. Whoops. Anyway, now radio stations are free to roam all over the country, and they're constantly trying to elbow their way into new markets in order to get your attention.
The thing is, radio stations don't really care about you. Sure, they might give you an occasional song that you'll love, but the truth is that they're just there to make money. They want to stop you from changing the channel when the ads for coke come on, so they can keep you glued to their station as long as possible. Stay strong – change the channel!