No, that was not the only leak. My opposite side light is also leaking. I also have a leak up top and to the front of the trailer. The exact same location on the opposite side from where I have the soft floor and water damage. Needless to say, I now have a tarp covering the entire trailer until it's dry and warm enough for me to get out there and recaulk.
Yes, the tub is over my bathroom roof vent (the only one I have). One other thing I didn't mention is that from the outside of the trailer, I used duct tape to seal the range\microwave vent opening, the refridgerator vent and around my entire storage doors. There was so much air pouring out of these areas that I could feel it blowing on my hand. Inside the trailer, it didnt' seem like all that much air was moving in, but I don't think it takes a drastic amount to cause enough inside positive pressure. Also, once everything is sealed up and the doors are close, all that air has to go somewhere. It's definitley not enough to do any damage though and actually cause leaks. I would think you'd need to be pumping in an awful lot of air for that to occur.