Just picked up RR Pearl RES and started figuring out the RES system. All seems fine and pretty slick, however, appears that the front and rear cannot listen to two different radio stations (i.e front through speakers and rear through headphones). All else works fine (front and rear can each have independent DVD, Tape, CD) however, if I try say an AM station in front and an FM station in the rear (through headphones) for the kids, it switches both to the same station. Is this normal ? Not the end of the world, however, you would think that this is so basic that it could be done.