I also recently bought a Garmin GPSMAP 62s and I am experiencing problems with the trip odometer. I reset the tracks so the odometer reads zero feet. Sometimes we wait 10 to 15 minutes before we start the hike and then trip odometer changes to as much as 2 tenths of mile before we even take a step. Is this normal? Defective unit? Is there something I can change in some buried menu to fix this problem?