I just looked at an old foto of mine from 2016 and indeed there is one wooden ladder as a stile  on the western side of the trackand a metal door over the track, so there were no two stiles side by side. I corrected that in OSM and moved some points a little based on the now available hi-res "Norge Orthofotos".
Thanks to Mateusz for the hint.
I think the note can be closed now and I will do so in about 14 days if no further discussion follows.

