If you're trying to balance out the wear, it might be easier to take it to an uphostery shop and see if they can remove the seat covers and swap them vs. trying to move the whole seats. As far as the controls not working on one, I'd check in this order: fuses, wiring at the switches and the switches themselves. If you can't see anything wrong on those, you may need to take it to a specialty auto electrical shop. I had a rear turn signal light on my truck that went out, and they found a pinch in the wiring harness inside the steering column that had to be replaced (sub harness). I would never have found that myself.