My 89's sunroof sits exactly the same way. It also leaks when (the only time) I take it to the powerwash. It only leaked when the washer sprayed it from the rear forward. I'm thinking it was designed so the water drains from front to back like when you drive down the road. I do need a new seal for it though as mine is now shot. Anyone have a line on a decent price for the seal that runs around the sunroof glass?
Alan