As of late with my Garmin Forerunner 935 I've been having issues with my pace logging less than half of what it actually is, even after calibrating after a treadmill run the day(s) prior. This is a new development with my 935, I never had this issue until a week or two ago, I don't know what has changed. Also, after a treadmill run I can't always select the correct distance because the miles selection only goes 1-4 and the tenths and hundredths only go from 1-7, the ranges that I can select aren't always the same, those are just examples from what I could select after my run yesterday. I have tried restoring the treadmill defaults but I'm still having the same problem.