Wont help. Already went through the entire process, and have the WD setup properly. The issue is with the truck since I can replicate the strange actions without any trailer and just weight in the bed. The problem is that it is so subtle that normally I would not notice it, but since I am well aware of the motion while towing, it stands out. With a trailer on, the motions of the truck transfer to the trailer and amplifies until the trailer kicks out, and when the sway control brings it back inline, it starts over again. It only happens on uneven pavement, when on smooth road the truck settles down and rides fine.
All this time I thought it was the trailer causing the problem, but now I know, its the truck doing it.