I've now moved on to building Master Pages for my project. I added a mini-TOC at the top of the master page. In the Twisties RH project from Peter's site, there isn't a master page defined.
My issue is that I don't want the mini-TOC on the master page be expanded when I click "Expand All" which is in the non-master page part of the topic. I don't want expanding all to include the mini-TOC that I have on the master page.
I didn't find an answer to my question, but I am now going a different route. Instead of using the Topic TOC > Topic TOC option, I am going to use the Topic TOC > Breadcrumbs option instead. It will be a much simpler route.