When creating a sub category the permissions should automaticlly inherit the parent category permissions unless otherwise set. As of now, Guests and certain membergroups can't see my parent category but can do whatever they want in the sub category?
Also, in the Most Viewed / Recently Added and Top Rated. That area should not show thumbs to items the user doesn't have access to. That's how I ended up with users watching content from a sub cat that they shouldn't have had access to. =/
So now with 10 sub cats, I have to manually create permissions for each sub cat instead of just the main cat. Brutal....