Originally Posted by andrewwynn

The one door unlock is key dependent did you have all keys programmed for this method? I program my keys to open all doors and wife's to do the one/all. I'm assuming you're using the same key and it does the unlock wrong some times.

I had a similar bug with my e53 where it would behave like I used a different key to unlock and it would auto adjust the seat to some other position and it would happen fairly regularly like monthly and somehow I guessed into this fix you can try;

When it doesn't do what you expect doing this kicked it back into proper function:

Get in the car put in the key to roll Sieb the window, in my case I had to press the memory one button to reset the seat and steering and then reach out the window and with the key lock and unlock the door. That would reset the system and it would not move the seat on unlock for a month or three until the next time. Until I figured out this hack it would reset my seat/steering/mirrors every unlock until I did the hack.

Good luck hope it works.