This should work if you do Tap-Release-Tap-Hold, the problem is that the delay from the 1st tap is still counting, so try and move your Set Max Walk Speed to be before the delay (keep the Set Presses to be after the delay), that should work.
This should work if you do Tap-Release-Tap-Hold, the problem is that the delay from the 1st tap is still counting, so try and move your Set Max Walk Speed to be before the delay (keep the Set Presses to be after the delay), that should work.