Missing subpoints in the menu
in Slides Properties I've marked some slides as hidden and other as subpoints of main points. Now I have the problem that not all the subpoints are visible in the menu after publication (subpoints of some main points are visible and other not) For example I see points 9.1, 9.1.1, 9.1.2, 9.1.3 and 9.2 but I don't see 9.2.1, 9.2.2
What could be the reason?
I've chcecked that all hidden slides hava appropriate level and the first slide with a new point (if there are many) is always visible.