Hi...I'm brand-new here, and have a concern about the rear window shade. I leave it up while at work, and it goes down when I start to back up to leave, but when I put it in "drive", it goes back up. I took it to a dealer to have it looked at, but they refused to even look at it, saying that is "normal". Well, if it is normal, why doesn't it do it EVERY time I put the car into drive? Am I just so hopelessly stupid??

It only seems to do it when I've had it up all day. Can anyone else shed some light (pun intended

) on this? Many thanks!