I can't figure out how to make a view exclude certain categories from an image module gallery view on drupal 5.11.

Here is the situation. I have a vocabulary type of "photos" and within that several terms like A, B and C, each with several terms under them. I want one image gallery to display photos from A and B, and a different gallery for C. So for the view I am selecting node type=image, vocabulary name "is all of" photos, and taxonomy:term "is none of" C and its sub-terms.

However the gallery for A and B still shows the C terms, even though they are empty. When I change the view to "is one of" A and B, I get the same thing.

How do I avoid having the empty galleries for categories I want to exclude?

Any insights appreciated.