Treadmill calibration

I have been using the “calibrate & save” feature at the end of my treadmill runs this winter. Typically the watch distance is a few tenths longer than the treadmill distance which is not bad, but I want to make the adjustment. For the last few times, the watch will not provide the full range of tenths and hundredths of miles to calibrate. For example, if the watch distance is 5.34 miles, but the treadmill distance is 5.05, I reduce the .34 to .33, .32, .31, .30 and then .99. The watch won’t display the other digits between .30 and .00. Is anyone else seeing this issue? I am running software version 12.50.