Gentlemen,
My WER was doing the same exact thing that you are describing. I thought that I may have a defective unit. At the time it was still under warranty so I sent it to WER. They tested it and assured me that the unit was in perfect working order. They theorized that the stem bearings may be shot, resulting in a "different" feel when turning the bars away from center. I didn't really buy that. In an effort to appease me, they rebuilt the unit and changed the fluid anyway.
I guess I've taken their word on it. But I'm still not completely convinced that the thing is working "normally". If you can feel it when the bars turn one way but not the other, how can it work both ways in while riding?
If I still doubted that it was working normally, WER suggested I test it myself. They said find a rocky, heavily rooted trail and ride through it. Then, disconnect the link arm then ride the trail again. They practically guaranteed that I would feel a big difference.
Still, the fact remains the same (for me anyhow). I definitely feel more damping action when turning the bars to the right, bike on a stand, adjustment all the way in.
Ciao,
Chuck