I have a montana 600. While walking and using track log, elevation records (on trip computer) a much higher climb than actual up to twice as much. Then when I download it to BaseCamp it has a more realistic reading on my PC. It even continues recording elevation (and moving time/trip odometer) while stationary. How can I fix this. Not by full reset (as advised by Garmin support) as this has happened after a full reset.
