It seems that within a hierarchy created with the hierarchy classifier,
documents can ONLY exist at the LEAVES, not at internal nodes. If a document
exists at an internal node, it prevents the display of any deeper
nodes in the hierarchy.

Example: I want

Section 1
Section 1.1
FIRST DOCUMENT for Section 1.1
SECOND DOCUMENT for Section 1.1
Section 1.1.1
FIRST DOCUMENT for Section 1.1.1
SECOND DOCUMENT for Section 1.1.1
Section 1.1.2
FIRST DOCUMENT for Section 1.1.2
SECOND DOCUMENT for Section 1.1.2

The problem is, if I put any documents in "Section 1.1" (by setting their
metadata appropriately), it prevents the display of any deeper nodes:

Section 1
Section 1.1
FIRST DOCUMENT for Section 1.1
SECOND DOCUMENT for Section 1.1
[ *** no deeper levels shown!!! *** ]

But if I eliminate the documents from Section 1.1, then magically the
deeper nested documents appear:

Section 1
Section 1.1
Section 1.1.1
FIRST DOCUMENT for Section 1.1.1
SECOND DOCUMENT for Section 1.1.1
Section 1.1.2
FIRST DOCUMENT for Section 1.1.2
SECOND DOCUMENT for Section 1.1.2

This seems to imply that documents can only exist at the very leaf-most
nodes of the hierarchy. I tried to find Greenstone example libraries
where this was not the case, but couldn't find any.

Is this correct? Is it impossible to display documents at internal
levels in a hierarchy? Or is this some sort of a formatting issue?

Thanks,
-Norman