[Focus man. Focus.]

So when I was switching my seats on the weekend I was in the hatch and a couple things were wet. I didn't take much notice and thought I had a leaking bottle of water or something like that. But today at lunch I got some groceries and when I popped the hatch and opened it a whole stream of water came out from the bottom of the door right where the inside trim and the bottom of the door meet. I checked the 3rd brake light and the seal seems ok. I am stumped as to where the the water is coming from.

Has anyone else had this problem?