Hi Greg,

the data source of type 'menu' is intended to build the exact structure of menus used in your site.
In this way the sitemap will contain the structure for menus, and of course this should be the basic structure required for a sitemap.

You can add more elements to sitemap using the data source of type 'content' if you have a lot of articles to include in sitemap and you can create additional data sources of type 'user' to grab data from 3PD extensions.

By the way the data source for menu and content are separated and also in sitemap they get rendered as independent tree structure.

If you need help configuring settings on site contact me.

Best regards

John