I hook my 4S up to my car stereo via USB. Before plugging it in, I have to chose the playlist I want to play because once I plug it in, I can't control what plays via my phone. Every so often, when I plug it in... it will default to some random song playlist and it will always start with the same song and play in the same order. If I unplug it and set the playlist again and plug it back in, all is well. I setup iTunes Match the other day and now I'm having all kinds of problems. First, no matter what I do on my phone... when I plug it into the car, it always plays the same random playlist starting with the same song and in the same order. If I unplug it or turn the car off and then play again... it reverts back to that first song. Not only that but often when I plug it in, my car will say there is no music on the device. I realize I could go with an AUX cable but I don't understand why USB has this issue... and I don't understand why iTunes Match isn't working well for me. Any suggestions?