You can take a look here at the site: http://www.advancedpps.ca
Using the NAVT plugin via widgets.
I created the first list group (Pages) which is actually mostly pages with one category. I successfully inserted it into the sidebar using the regular widget interface and I was cheering. I then created a second list group (Categories) and have 2 problems: first, it lists the first sub-category with the arrow as if it is a parent (the arrow is part of the theme style obviously); and it breaks the styling of the rest of the sidebar (the standard Archive and Blogroll widgets) which didn't happen when I only used NAVT widget 1.