It sounds like you may have three leaks: the white water tank under the trailer, something (maybe the bubble window seals) near the mattress, and what you saw dripping from the ceiling of the Aframe. A leaking window is a well known issue on this forum. The water tank should be an easy fix by the dealer. The water leak from the ceiling should also be easy as the dealer can spray water on the top of the trailer and find the leak.
Not sure if you can do a water leak pressure test on an A frame, but your dealer might know that.
