As you can see this route,¿ it's probably good? that you think it's a john because you can do laps, you could not do it all the way, thanks, I hope your attention, we're not experts, except to give pedals in......
Your calibration is fine but I am concerned your unit is rotating on its mount. Please post images of your PP mounted on your bike: top, side, bottom and front views.
if it is a field for which it does not move, it is precisely used for the contour video, it will be removed and tightened directly and the surroundings of the subsequent trip