FYI v.4.1.5.5ec1331 Configuration | Admin Accounts, http://rosebreeders.org/amember/admin-admins, - shows all admins as Super Admin Yes Yes Yes Yes even for those with limited permissions. This is not a true problem, admin permissions work properly.
You must just edit them and disable "super-admin" flag for each. If that flag is set, permissions are not taken into account at all. (like unix permissions for "root" user).
Even when the super-admin flag is turned off the admins all show up as super-admins in the list of admins. When you are in the edit area for admin permissions the various permissions show correctly, and they work correctly too. The list of admins just says everybody is super-admin.