Many groups in big gallery, adjust rights

Hello big All!

I have a very big gallery (more than 50000 photos) and deep hierarchy. All gallery only for registered users, and i have a many groups with different rights.
And if I add a new group and make a right to a top folder(album) for see included albums - it appears to user in this group can see all included albums and I must reconfigure a right to each album for blocking view and stay right to see only to album for this group.

How I can do this more simply?