Sorry. Thought I had it fixed. I note that if I insert a page number just before 3.2.1 the page number shows as 3.1.3-2. Inserting the same page number just after the 3.2.1 heading gives 3.2.3-2. This is the same number as is shown at the bottom of the page.
I suspect the problem is what changes the second level number. You currently have your Chapter number changing at Heading 3.
See also http://word.mvps.org/faqs/numbering/chapternumber.htm
According to that article I was wrong with my advice to not use the next page Section break. The author knows far more about this than I do.
This thread is a parallel thread to http://answers.microsoft.com/en-us/o...a5a10be1#_self
In looking at the style definitions, I see that the steps outlined in
http://www.shaunakelly.com/word/numbering/numbering20072010.html were not followed. I suspect that if you did follow those steps this would be working. I will try tomorrow to duplicate your heading styles using those steps and see what happens.
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addendum. I tried that and it didn't help. I will try recreating your document recreating the page number formatting and see if that is of any help. Will post results in parallel thread. Sleeping first.