Expression pedal won't calibrate correctly (Dunlop DVP4 Volume (X) mini)

Maybe you can help me with the internal switch settings on the dvp4-volume-x-mini-pedal ?
At the moment I have the top switch set to Exp (to the right) and the bottom switch also to the right… and of course connected from the Aux out of the pedal to the QC expression input with a TRS cable (same result with multiple cables as well as with 2 identical pedals). When I try to recalibrate, the Position knob just sweeps up to .50 and sticks there instead of 0-100 as it should when I rock the pedal. After I save, it just sweeps from .040 to 0.60. (Using Core OS 2.2.0, BTW) Any ideas? I’ve tried every combination and a Boss EV-5 pedal works just fine. Thanks!