Course Elevation Plot data from GPX or from Map?

I ran a course I uploaded yesterday and all the elevation data seemed accurate however when I look at the elevation plot, it is way off.  Viewing the course plot on the watch during the activity it shows a starting elevation of 7301' and max elevation of 9285'. However it shows an ascent of 8408'!  The true ascent was 2133'.  The climbpro vert was also way off. I assume the GPX data is bad.  

What would be the easiest way to calibrate the correct ascent numbers in the course?  I can't find a way to view the actual GPX ascent data points outside of the watch.  Also, I assume that the ascent and climbpro data can only be ran from the initial GPX data and not the actual map from the watch?