i checked that and its totally fine. its raining now and it doesent look like it leaks anywhere. However i will look at vapor barrier. The worst part is its just a circle no bigger than a dinner plate in the middle of the floor.Also check the rubber seal around your doors.
If the vapor barrier has come apart from the door you can also use black rubber cementI had the same issue. I replaced my front vapor barrier because I could see that it was losing its integrity. Once replaced that fixed my problem.
Here are the vapor barrier part #'s for you
FRONT - 51728194682