The seal have an center point on the seal, and that was put one the center on the windscreen so the seal was mount the right way..
now i am not a window mount man, but it dont seems like there are tension on the seal at all, the seal was mounted on the window before they put the window in the car, so there are only the tension that hold it on place on the window.. the window man called me yesterday and told me they have ordrer a new seal, and told me they never use genuine toyota seal on supras, (i have ordered the toyota seal myself ) so they have ordered the seal they normal use on supra, and will come next friday and mount they.. i dont know if they are right or wrong..