Elevation Gain Wrong during MTB

Why am I getting all of the spikes and drops during my Biking sessions? Its only a 1300' climb and it says i climbed 4400' .....

Seems that virtually all the feedback Garmin has received on 18.10 from the people who have tried it and posted about it here is that it does NOT fix the problem. Nonetheless, Garmin seems to be turning a blind eye and deaf ear to this feedback. The tone deafness and lack of competence shown here is astounding. 

Everyone here has spent hundreds of dollars on one or more of these devices (we have two, including one that we bought new only a couple of months ago). As the saying goes, "The squeaky wheel get the oil."   We will only get somewhere if we are the "squeaky oil." I encourage everyone here who has this problem (and evidently, that is every owner of an Instinct watch!) to start leaving appropriate reviews of Garmin and their products on Amazon, Facebook and other media. 

We need to get their attention and get them to realize they can't just paper this over and look the other way. Their inability or unwillingness to timely fix this problem is very disappointing. I think they have way too many different models out and are just not able to support them. They realy should be providing refunds or replacement watches at this point.

I just went to i buy on amazon, and I put a very negative review.
I wish we all did that.