i believe if a problem was fixed the warranty is extended on this, at least that was what i was told in regards to my headlights. i would try to get it taken care of as it was a problem that was supposedly fixed.. especially with all the water damage caused by the bad seal. a hose isnt gonna replicate the multi-directional nature of rain to engulf the whole door and find the bad part of the seal. but ya see if the seal got an extended warranty since it was replaced just to be safe, though i dont know how long they would guarantee their work.
hope it works out for you.