Jim, want to post your findings just for the record if/when someone else wants to know?
I was going to chime in to say, just for the record, that part of using "Auto" mode means that the system automatically chooses which vents to activate, foot well, face, or windshield. And if you notice, the active vents actually change during the course of your ride based on how much of a difference (and what direction that difference lies) there is between the internal temperature, the desired internal temperature, and the outside temperature.
If you don't like the vent selection, you can either play with the desired temperature to get the vents you want opened, or hit the Mode button to select the vent configuration you want -- feet, face, windshield, or feet and face or feet and windshield.
Geeky enough as it is, I remember the joy I felt the moment I finally figured out just how the heck the system works.