I got on the treadmill wearing my heart rate monitor last night and when I finished I had 9300+ steps. I had not used the heart monitor with my vivofit2. It came with my original vivofit, which recently died. On the original vivofit, I could hold down the button and stop the connection to the heart monitor. So when I finished with my treadmill exercise last night, I was pushing buttons trying to figure out how to stop the connection to the heart rate monitor. I couldn't figure it out, so I just did a synch to my smart phone. The synch recorded the number of steps I had BEFORE my treadmill activity, which was about 5400 steps and the entire treadmill exercise was gone. My device was reset to 5400 steps! How could the steps from my treadmill exercise just disappear like that???
What did I do wrong?