Alice, important question:

What trail shows on the app? And what topographic does it use?

Is it the one that Google Maps provides in their "Terrain View" like this? (or do you use a different map?)

   

...edit... I think I answered my own questions by reading your Mt. Whitney Guide info about the app. It sounds like you personally hiked the trail and gathered pictures and way points. So the (incorrect) trail on the Google terrain view is not used in your app.