Top Level Folder Share Permissions !!.

I am having a problem in exchange small business server.  I am trying to allow certain groups of users, ie staff permission to not be allowed to change the top level folders in the share, ie move them, etc. but then allowing them the ability to move, add, delete folders and files under these top level folders.  Also need another group or maybe not like managers in which they can have the ability to move, add, delete folders and files at all levels even the top level.

At the moment I have setup the groups Staff and Managers.  Have set folder permissions on Managers to everything selected on top level folder. Staff have only the read and list and traverse boxes checked with 'only on this folder' applied on top level folders, and then with 'sub-folders and files only' applied as well with full control - everything selected.  Also the allow inheritable permissions at the folder security 'advanced' / permissions tab has been unchecked.

This works to a degree as if I logon as a staff group user I cannot do anything to the top level folders which is what I want - great, but the sub-folders and adding files to these I cannot do it says I have no permissions.  It also does the same thing when I logon as Managers user who need ability to do everything at all folder levels.

Any clue to what I have done incorrectly or why the permissions are not allowing me to do what I specified it to do ??. Start Free Trial