Just an update:
I had all the leaks that were described above.
During recent month long deluges I have found a new one.
If you reach into the trunk and feel with your hand along the outer trunk edge there are a set of overlapping sheet metal pieces that form the frame of the trunk.
These sheet metal pieces reach from the infamaous "place where 3 pieces of metal goes together at the rear corners " all the way to the corner where the hinge is attached. These pieces act as a hidden conduit for water that leaks anywhere along that corner or edge ( i found some pin hole leaks) and the deposits the water mysteriously at the rear of the trunk.
I had to remove the trunk gasket and liberally apply 3M gasket adhesive in those corners.
Since doing this I have not had leaks even in hurricane Issac.
These sheet metal pieces are not visible, bu if you feel with your hand there just inside the trunk edge on either side of the trunk