Adding to Category Adds to Area
If we have a stacked root/primary node imported from VaultWiki 3 (e.g. Area+Book, Area+Category), then clicking the link to add pages to the Book or to the Category would instead add the page to the Area and not the category/book. This occurs because create/publish actions are not unique for each parent-node-type, and the Area-type usually takes precedence over the rest when resolving the post action.