The running activity "Pace" on my FR 255 is all over the place. I have made sure to confirm the GPS lock is confirmed and waited a few minutes before starting the activity. I have up the GPS setting to the multiple band setting. With all the changes I still see paces during the run that a too fast. I can run a 2 - 3 minute mile at any point but is stay the and then suddenly jump to an 11 minute mile pace. The power and cadence measurements are also all over the pace. The last run the watch said I had a 300 steps per minute. The average pace seems accurate though.