I have had two wtt and had the same with both arms. I can only guess that as long as the paddle is in the fluid its doing its job. I would also take a guess of why the paddle is not completley level with the fluid.This might be a cause of time and more slack at the other end dealing with the nylon treads. This is just an opinion from past ownership.
Well Tempered Ref. Arm
I've noticed that when I look at the arm,in the area where the strings attach to the paddle,I notice that the flat upper portion of the paddle - where the arm attaches thru it - does not sit perfectly parallel;it's tilted maybe 8-10 degrees from perfectly level.Is this a problem? Should this be perfectly level?