I've noticed the same behavior. If you set them to auto, they will do whatever the algorithm tells them. So, nothing, heat, or ventilation depending upon ambient temps outside. If you turn them on manually, they remain at whatever manual setting through stop/start cycles.I noticed that once the heated or ventilated seat function is activated (on), they will stay on in the last known position no matter if you shut the car off and restart it later... they must always be manually turned off even if the seat has been empty for a day or two. Is that a user definable situation? Is there no time when the car is shut down and restarted later that the seats will default to off?
My wife uses the heated seat if its' below 50 degrees outside. Sets it on high (3 leds) and then, a couple of days later, I'll notice that I'm just baking the seat for no reason and turn it off. I think this behavior should be added to the quirks list. Of all things that should reset across a stop start cycle, this would seemingly be one of them!! If you want the heat or vent on each time you start up, just set it to auto and live with Acura's opinion on the levels.