Stabilization modes - not levelling horizon or following path

VIRB Edit 5.3.1 on Windows 10 with my new 360

I cannot find any calibration options in camera for level or compass, so if these exist someone point them out to me please!

When I try "Stabilize Only" which is supposed to correct the horizon it is always tilted anti-clockwise about 15 degrees.

When I try "Follow Path" the centre of the image is down and left of the real path.

I did also try "Compass Lock" but I cannot locate anyway to influence the direction apart from the "Set Initial Orientation" for the start of the video - should there be a way of setting this at various points (without using hyperthingy mode) ?

Thanks!

Peter