How to Control the Page Numbering in a Word Document
http://word.mvps.org/FAQs/Numbering/PageNumbering.htm

Coan, Bill
Word MVP Site, The
2005

Abstract:

Word's page numbering scheme isn't directly obvious but it isn't needlessly complex, either. Indirect might be a good term for it. Once you understand how it works, all sorts of possibilities open up. Unfortunately, the built-in tools that simplify the insertion of page numbers also happen to make it more difficult to tell what's really going on. So, for the moment, forget everything you've learned or think you know about page numbers.