Wonder what changed on the '09s.
My lights live in auto, and while I make an effort to turn the wipers off, they stay in auto some time as well.
As a matter of fact, I was away from my car for 11 days last month when I was out of town, and I left both on (I remember because I was peeved that dust got dragged across my clean windshield when I started moving... apparently it confused the wipers.