Mine's only ever 1/3 as well, even when it's otherwise been verified to be running between 179-194º. The stock temp gauge is somewhat famous for not being very accurate.
That's definitely not my experience. This LX can sweat you out of the car even when it's 10º outside. I usually set it at 70 or so and let auto do its thing.
Second row heat comes from the floor, not the ceiling.