Use a fully qualified title
They might have provided fully qualified titles in the individual html pages.
For example, a page with the above mentioned property npnf212-001.htm#ha177 could be titled something like:
Nicene and Post-Nicene Fathers > Series 2 > Volume 12 > Leo the Great, Gregory the Great > Leo the Great > Sermons > Sermon Title
Although the actual hierarchy is different, see http://www.newadvent.org/fathers/0622.htm for the general principal.
I am a bit surprised that they let it ship this way. Perhaps BW acquired this module from dedicated hobbists who might have overlooked this and that there was not time to fix it for the BW8 release. I would think that we'd all have to admit that we'd prefer to have it this way than not at all.
Regardless, I am confident this will get fixed.