site wide disable editing TOS , login image and Admin Mess.

Hi all,
hoping to post in the right place.
I've installed these plugs (besides others)

    Login Image
    Admin Message

Now testing as 'ordinary' (a blog within the 'network') user, I see I can edit them, all of them, and the changes made do affect all the platform (home/root too)

First though was about the wonderful 'toggle admins menu', I have read that it can be tricky, but after unistalling that and reverting with a backup(just made before installing the latter), the 'problem' was still on.

How shall I proceed?