Heated/Ventilated Seat Buttons

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?