The only thing which I have found to work most of the time is to use the FOB and lock the car whenever I get out of it, even when it is parked in my garage. For some reason, if I park it, the seat will slide back when I shut it off, but if I do not lock it, when I next get in it, the seat will not return to the previous stored settings.
Look at some of the information I have posted here, straight from the owners manual
Note what this states I would suggest you read slowly throught it (as I myself have had to do this to get an idea of what is being stated)
Press the OPTIONS button until SEAT EASY ENTRY appears on the display, then use the RESET button to page through the following choices:
SEAT EASY ENTRY ON
SEAT EASY ENTRY OFF
If you choose SEAT EASY ENTRY ON, when you turn the ignition off and remove the key, the seat will automatically move back and the telescopic steering wheel (if equipped) will return to its full-forward position for an easy exit or an easy entrance when returning to the vehicle.
The seat will only return to the forward position if you unlock the door with the keyless entry transmitter or press the appropriate MEMORY button.
SEAT EASY ENTRY OFF turns off this option.
Page 2-6, your memory settings will also be recalled when you press the unlock button on the remote keyless entry transmitter, See Memory on page 2-55 for more information.
Your memory settings are now programmed. Any changes that are made to the audio system and climate controls while driving will be automatically stored when the ignition key is turned off.
When first entering your vehicle, after pressing the unlock button on your remote keyless entry transmitter or a MEMORY button, a recall of your settings will occur when the door is closed and the ignition key is in the ignition switch.
A memory recall can be stopped by pressing any memory seat, mirror or steering column position button.
Memory recall will not work if the vehicle is moving. Memory recall will be temporarily interrupted during engine crank. If easy entry is on, you must press the MEMORY button to reset the seat.
FOB