This issue is starting to drive me ***shit crazy. I think I've finally been able to get this done. For the time being. Word being Word, it may change it's mind.

It appears that when it comes to lists, numbered or otherwise, the update style to match selection option just does not work. I was able to get things formatted correctly by using the style pane (not the gallery), selecting all the paragraphs using the style, and then modifying the style.

Does this track with other people's experience?