When my REX was leaking at these seams, the water would come into the car at the point of where the hydraulic lifts for the hatch met with the body. I could see it dripping onto the top of the "cargo box" in the back. I resealed these seams and no longer had a problem.
jc836, do you see water coming in there? Where does it collect in your car? You say the seams were sealed at "each end" - do you mean from one end to the other on both sides? I hope so.
malfunction, what's up w/ yours?