i own a new garmin etrex 22x.... this unit does not have the ABC sensors...it is not the 32x model.... as a test i have been taking it on my daily walk.... 4 miles every (most) morning, same walk, same sidewalks, same paths, same exact route everyday.... at the end of my walk i "save" the track and click on "yes" to clear the current track and associated trip data.... a short while later i recall the track to review it.... i go into track manager, click on the saved track, click on view map, click on the menu button, click on review track, and look at the recorded stats.... my problem is with the recorded ascent and descent values... each day they are different, and each day they are greater than the last day... as an example... day 1 .. 1700' range day 2 .. 2300' range day 3 .. 3300' range day 4 .. 6000' range day 5 .. 7300' range day 6 .. 8100' range i have gotten to the point where i delete the track off the gps after recording the stats, and still the next days ascent/descent valves are greater then the last....there are no other tracks stored or archived on the gps.... i have tried my walk while using just gps, and gps and glonass, with the same results... just before i start my walk i turn on the gps, i clear the current track, i reset/clear the track and trip data setting, i go into where to and make sure nothing is running, i go into active route and make sure nothing is running.... i am wondering what i am doing wrong, if anything.... maybe the 22x unit is not capable of more accurate data without the ABC sensors... any suggestions, thanks in advance for your help...