[M Skabialka]

I have a document set up with numbering to four levels. I can view the
Document Map and see each of these header levels. When I click on these it
takes me to the right place in the document - that is, except for two
instances (out of about 300). I click on the header
(e.g. 2.3.4 Performance) in the Document map but it does not highlight in
the map, even though it goes to the correct place in the document. I have
tried to reapply the numbering format, and tried the format painter, but it
will not highlight.
I have repaired the document and accepted the repairs.
What else can I try?
Incidentally, when I reveal the formatting of two similar levels, including
this one, the difference is that each has 15 or 20 different tab settings,
but when I select "Tabs" none are listed to clear, and they don't show up on
the ruler. How do I clear these, even though I don't think this should
effect the way it shows up or not in the Map.