The Tutorials page has two layers: the "top" layer is Tutorials, which is a superdoc. It contains three components: the Tutorial Categories doclist, the Tutorials sitedoclet, and the "Add a tutorial" form. As a convenience, the "Edit" link in the top right corner of 954 actually takes you to the edit page for 510154.
SiteDocClan: because Tutorials is a doclist, with its own free-text field at the top, there is essentially no need for the Tutorials sitedoclet. It should probably be left empty. (It would be rendered below the doclist anyway.)