Just went for a 35 minute walk to try to reach my 30 minute goal for the day. The app shows I did a complete 35 minute walk/1.79 miles however my exercise ring is only counting it as 20/30 minutes. Am I missing something here? Happened to me last night too when I had did 60 minutes of walking (two 30 minute walks) but they only totaled to 56 minutes. Wth??? Last night I had the heart rate sensor turn on for exercises, today I had it turned off but it doesn't seem to effect the time issue I'm having.