It could be an illusion, but it appears that the seal is distorted in the area that the water is running over it and dripping down. Are you certain that it hasn't pulled loose in that area?Anyone come across the trunk seal being clean and in good shape, but still leaking into the trunk? Especially in this location????
Disregard the fiancee's pink travel blanket.
If their was minor damage to the hinge support you can loosen the lower bracket bolts to lower the lid. If there is not enough adjustment travel, the bolt holes can be elongated to gain more travel. The hinge can be damaged by a wind gust or forcing the lid closed with something in the way.Here is one more thought. I worked on two Solstices where the rear deck lid was raised nearly 1/8" in the right rear corner. I don't know why. Maybe the rear deck lid got caught in the wind and bent the hinge causing it to sit raised like that. I could see a gap being created between the rear deck lid and trunk gasket.