I can fix part of this:
The part I can fix: The two wear value DROs on the WCOffset-touch page were swapped in position.
Thanks for spotting this - it's fixed for the next MSM release (which I'm working on as I post this).
The part I can't fix: Wear values are flaky in Mach3. I'm told it is fixed in V4.
Mach does not consistently apply the wear values, the work around is leave the wear value 0 and adjust the base value.
Dave