Without seeing your document, it can be tricky to diagnose exactly why you are having this problem but it is likely related to one of two possible things.

1. You have a section break sitting in your document as a revision tracked deletion. Word could be holding that section break there until you reject/accept the revision.

2. Your section break could be serving as an anchor for a floating graphic. It is not uncommon for people to set up 'chapters' with floating graphics or artwork which have to be anchored to paragraphs.

To examine your document more closely, change to Draft view as it will enable the Section Break to show up if you have your view options set correctly. Also check to see if there are tracked revisions in your document and if so, make sure you are showing deletions on screen.

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Andrew Lockton
Chrysalis Design, Melbourne Australia