PNCconf bug in rotary axis setup?

I have been rebuilding my gantry-style CNC router and (among other things) adding an A axis. I decided to use PNCconf as a starting point again, and then manually add changes for my machine. Plan it to get something like my old Axis/GladeVCP running again and then move to QT Dragon or Probe Basic.

At the calculator for the A Motor Axis scale, the "Reduction Ratio" (rotary axis A, remember) returned odd results, and there was no version of my 10:1 reduction that yielded meaningful results. Just checking the tick box with the default ratio of 1, changed the number. My own arithmetic indicated that it was expecting a ratio of 2.54:1 an auspicious number, but not for something that is in units of "degree/rev". 

Then I noticed that "Reduction Ratio" is the 4th check box down, which on the other (linear) axis would have been "Leadscrew Metric Pitch". I'm guessing there is a 2.54 in that arithmetic So. Seems the name and units of that 4th check box were updated for rotary, but the arithmetic didn't make it.

Or its something else
Many more dumb questions to come as I get this thing back up and running

Ron