Dropout of Pitch/Roll, Lat/Lon G's

I've just purchased a Virb Elite with the hopes of adding interesting data to motorcycle and mountain biking videos. I'm doing some trial runs and the results have been mixed. There seems to be a lot of jumping around in the data for speed and altitude. I've seen posts with similar discussions. I'll chalk that up to GPS accuracy, tree cover, etc.

I'm also having an issue were Virb Edit Overlays show erratic or even no data for pitch, roll and the data displayed by the braking/accel and lat g's gauges. I've used the display on the Virb to zero the level but beyond that, the data just drops out and shows nothing or "-"

Hopefully I can find a way to overcome the audio issues and I'm trying to find the best video quality that works, however, the data available and using the data in dashboards was the whole reason I made the purchase. Thoughts?