My seat doesn't go back to where it should when I stat the car.

First off, the vehicle in question is a 2012 300S with everything but nav. I use the setting that moves the seat back and the steering wheel up whenever I turn off the vehicle. When I start the car, the wheel goes to where it should, but the seat only moves up a hair. I can then hit the button for the memory seat and it goes to where it should. Any idea why this is happening? It only happens about 50% of the time. Thanks!