A family of Microsoft word processing software products for creating web, email, and print documents.
To add to what Suzanne has said, if it turns out that numbering wasn't set up correctly, click in the first Heading 1 paragraph of the document and click Home tab | Multilevel List | Define New Multilevel List to display the Multilevel List dialog box (ignore the fact that the "define new" part is misleading). Then, following the instructions in the article at http://shaunakelly.com/word/numbering/numbering20072010.html, recreate the numbering.