How to Restart Style-Based Numbering

The most reliable way of creating numbered paragraphs is to use paragraph styles to apply the numbering. This makes all paragraphs with the same numbered style belong to the same numbered list, and numbering is continuous through the whole document.

Aldis, Margaret. Word MVP Site, The (2002). Articles>Word Processing>Information Design>Microsoft Word

How to Safely Update a Document's Styles from its Template Without Using the Organizer

If you want to update the style definitions of a document with the style definitions in its attached template, you can manually select Tools + Templates and Add-ins, check the box which says 'Automatically update document styles', click OK; and then, because that setting is sticky (and most of the time, undesirable), immediately select Tools + Templates and Add-ins again, deselect the 'Automatically update document styles' box, and click OK.

Rado, Dave, Margaret Aldis, Ian Sharpe and Beth Melton. Word MVP Site, The (2002). Articles>Word Processing>Style Sheets>Microsoft Word