Sometimes when I go to change XM chanels by pressing the preset button, the radio just does not change to that chanel. I can hit it several times and nothing. I usually have to then hit another preset and then go back to the preset I originally wanted for it to change. I had the IPOD adapter installed when I first got the car so I don't know if it was like this before or not, but I would assume it is playing a role in the problem. This also happens even if I don't have the ipod plugged in. Does anybody else have this issue?