If its an engine torgue effect as you alter your rpm the effect will also alter, but usually torque seems to induce roll.
Pongo and i believe Mathman posted above they have a calibration issue, cant comment as I am not suffering that.
I am pleased this info has helped others and of course myself achieve fine control at the break point especially after some of the posts On Cougar world and here suggesting control problems are in fact a user problem because we must be too weak to control the stick
Unfortunately it seems the CCP side of the cougar software really does suck because its this alone that causes lack of controllability at and near the breakpoint, disabling the curve and dead spot adjustments in CCP and set these using the in game software makes a world of difference, I just wonder how many other games could benefit from this.
To any doubters with a Cougar do yourself a favour and at least try the Ostwind test posted above, you may get a surprise and find you do in fact suffer this same problem, if so the cure is posted above.