[xwiki-users] Access rights management bug?

Dear Users, XE 3.1. Playing with rights I found very unpleasant and IMO dangerous behaviour. Two Default groups: XWikiAllGroup and XWikiAdminGroup Admin gives rigths to XWikiAllGroup to view pages - no problem. Admin gives rigths to XWikiAllGroup to EDIT pages. From my point of view - EDIT means only page EDIT in edit/inline mode, but not: - managing page access rights - editing in editor object mode. I even tried to prohibit to XWikiAllGroup users Administration rights, nothing changed. As for my project - it is a disaster. I must separate four categories of users: 1. All users - have View access to definite spaces. 2. SOME registered users - have edit rights for spaces/pages (edit/inline), create rights. BUT NO Access rights management, NO object mode editing) 3. Admin Users with Admin rights on several spaces to delete/undelete pages AND access rights management. 4. XWiki Admin As I discovered, I can't get split second and third group. :-( It would be wise to avoid rights management and object editing mode availability to "smart" users, that can bring a mess into the system in couple of seconds. For example, "smart user" with edit rights will easily prohibit access to pages to whole XWikiAllGroup OR he even can grant  VIEW rights ONLY  to  XWikiAdminGroup with the same results - page becomes inaccessible to non-admin users. I checked everything with a Test user in XWikiAllGroup. I don't know if it is a bug or a feature, but for me it's a disaster :-( Is there any way to make XWiki project safe? Best Regards Dmitry Bakbardin