Oh, I seem to be embarrassing stupid. I pressed and held key 1 instead of key 2. I only used the config page to switch all sync options off and then never again by now and the glyphs felt so familiar when I saw them that I did not notice my mistake. I feel terribly sorry for the hassle I introduced.

I hardly dare to pose another question now, but on the ratchet page, when an active trigger has ratchet sub triggers and the next steps are inactive on the main trigger page, the step indicating light is moving on the row of the last active ratchet sub trigger instead of the highlighted main step row (row 6 on the grid). Is this for a special reason?
Also regarding the irregular sub steps - I cannot find any circumstances to reproduce this. It is just happening every now and then under all circumstances, maybe more often at higher (but still reasonable) tempo. Sometimes sub steps are missed, sometimes there are extra substeps (as in: all step subdivisions even if one is off/greyed out). If there is any possibility to introduce this by accident I might have done it somehow of course, as we know now…