Its normal to have a bit of water is your doors, well not hundreds just a few drops running down the window and stuff. You just need to get a sheet of plastic and make sure the door is 100% sealed and the cabin doesnt get damp. Clear the drainholes out on the bottoms of the doors. As for the door seal which runs round the door, there are small slits in it for clips about every foot or so, they can be a bit tricky to get back in.