Looks like distances or durations change after syncing the SSW3. Seems like most often people report a range of 6-10 minutes missing from their activities with everything else intact. Yikes! We're delving into this issue!
If you would like us to inform you the moment this issue is permanently fixed, just click on the "Submit a request" button below and submit a report using the subject line, "Android Wear: Distance & Duration Change After Syncing" with a description of the problem!