Actually ... I drove a rental car that moved the seat back every time I opened the door. I had readjust it every time, which was a royal pain in the keister. It was a semi-luxury car, too (or so I was told by every man at work, because they all had to stop and stare at it in admiration). I was really glad when my nice, normal Ford Focus was fixed and I could go back to driving it.
Sounds like it was memorized for a specific person (who wasn't you). My Suburu's seat adjustment is a more basic model than that. It doesn't adjust per person, but it's electronic as opposed to a bar under my seat, which is nice since my husband is a good 4" taller than me. I like not having to bend in half and reach between my legs every time I drive the car after he does (and I'm sure he's more than happy not to have to squeeze his face against the steering wheel to reach those stupid adjustment bars).
I double checked my number lock feature again last night. Resetting it by pressing number lock and restarting my computer. It seems only to work for that one time. If I shut down my computer (as is recommended for the health of one's computer and one's electricity bill), my number lock preference is once again forgotten. Darn annoying, that.