Any thoughts on my water leak? It seems to leak into the cab at the rear window seal (the big window, not the slider). Has this been a problem? If we pour water into the channel above the rear window at the upper, driver side corner (or at carwash or in the rain) then it leaks inside at the very top of the window. Also, we do not know where the stain on the headliner in that same corner came from. It does not leak right inside the third brake light so we don't think it's the light, and we haven't seen problems with the sliding window or drains. I attached three photos.