See if it might be this:
http://word.mvps.org/FAQs/Formatting/UnaccountablyIndented.htm

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Suzanne S. Barnhill
Microsoft MVP (Word)
Words into Type
Fairhope, Alabama USA
Word MVP FAQ site: http://word.mvps.org
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> I am having repeated problems within a large document, where the formatting
> of sections and subsections is incorrect when it runs onto the next page.
> Its usually just the first line of the new page but its a real nuisance. Any
> suggestions?