Recursive XML doc model does not create mapping class structure for lower levels

I am following the E2eRecursiveXmlTextSource test script.

I create a document model, based on the imported XSD and step through the creation wizard. On the third page, per the instructions, I expand the tree and select (check) the Supervisor node before clicking finish. What I get is a Supervisor mapping class which has no mapping tree elements against which to link the columns (which I add manually, again, per the instructions).

It is possible this represents new behavior, but I suspect not.

I'm attaching the Model Project Set (which has 3 projects).