unwanted menu items for assigned nodes created

I wanted categories with sub-categories, say... species and breeds, but I wanted to force users to choose one of breeds. So I've put them in two separate containers and set 'breed' to required. I've also chosen species categories to be distant parents of breeds.

Now, user chooses only a breed, but in menu he sees a list of species, with submenus containing proper breeds. This is what I wanted.

The problem is, that category_menu creates menu entries for assigned nodes, even though I've set both containers not to create any menu items for nodes.

After removing 'species' category and settings 'breeds' parent to 'this container' all works fine.

As a workaround I just disabled category_menu, for the category structure is quite simple.

Drupal 4.7.1 with category CVS