You can calibrate it on a shorter range of its sweep to overcome this.
It never worked for me. Because you still have that extra travel that exists in the switch itself. Once you the footplate makes contact with the switch, there's still roughly 1/4" of travel in the switch. Which means the pedal is overtraveling. I may revisit this someday, as I'd sure love to get it figured out.
And again, it's such a small issue that I almost didn't bring it up. It only bothers me where there's a "whammy" patch in my preset. No whammy = no problem. Usually when you're wah-wah-ing around, you're not running from 0% to 100% anyway. But when you're whammying around, you notice when some notes hit 97% of their octave pitch, sometimes it hits 96%, sometimes 98%.
One thought was to put an extra set of rubber feet/bumpers, then calibrate the travel where it meets the rubber. Then in order to active the switch I have really push hard through the rubber.