My sunroof when it is close including the shade if I press the vent button the shade moves back and sunroof pops up. If I press the sunroof vent button again nothing happens. If however I press the sunroof button to the close position towards the front windshield. Then the vent closes from that popped up position. I do not need to open the sunroof all the way in order to get it to close from the vent position.
I had some confusion too, but as it turns out, when I tilt the sunroof and want to close it, I actually push the closing button, not the tilt button. If you you use the close button, the valance will stay open