Inconsistent heading numbering in LibreOffice writer

The document I'm working on has developed a strange numbering of the headings:

From the table contents (that reflects the sorry state of the headings):

1.
2.
3.
3.1.
3.1.1.
3.1.1.1.
3.1.2.
3.1.2.1.
3.1.2.2.
3.1.2.3.
3.1.3.
3.1.4.
1.1.1.1 # 1st reset of Heading4 numbering (with extra indent?)
3.1.5.
1.1.1.1 # Also restarts from 1.1.1.1
1.1.1.2
3.2.
3.2.1.
1.1.1.3 # Doens't restart from 1.1.1.1
1.1.2 # Now for heading3, but where is 1.1.1?
1.1.2.1
1.1.3 

As far as I can tell, the style for Heading 4 has the Outline Level and Numbering Style disabled and everything looks fine in Tools>Outline numbering.

On the first 1.1.1.1 Heading4, if I right-click and select "Continue previous numbering", the heading morphs into to a bullet list item. This can have something to do with mixed numbering styles, but I have don't see any selected in the "Styles and Formatting/List Styles" sidebar.

Bonus points: why is there a final dot on some heading numbers and not on others?

The document is initially a MS-Word document (gutted from all its contents except header/footer, and first two header pages, that was later clipboard-copied into an empty LO documents in the hope that this would shake out all the MS-Word clutter.

Using LO 5.3.7.2 on Linux

1 Answer

I successfully rectified the numbering by Right click on section heading -> Bullets and numbering -> Continue previous numbering.