Hi @ilnurgi, the business of restarting numbering for a numbered list in Word turns out to be quite complex. There's already an open feature request for it here: #25. Also see this response to a similar question on StackOverflow: http://stackoverflow.com/questions/23446268/python-docx-how-to-restart-list-lettering/23464442#23464442.

You can add to the feature request if you like. I'll close this one as a duplicate.

If you're interested in working on it let me know. There are several dependencies though, namely access to styles and numbering definitions, that aren't in place yet. So it would be a bigger job than just the numbering restart itself.