Config.php troubles

[toejam316]

My forum is running version 3.6.10 PL2, and recently a Administrator has requested he be demoted. I have gone into Config.php and removed all references to him (IE. His UserID) from the specialusers things, yet he still, for example, is undeletable or unalterable. This is rather annoying, so does anyone have a clue whats wrong?

// ****** USERS WITH ADMIN LOG VIEWING PERMISSIONS ******
// The users specified here will be allowed to view the admin log in the control panel.
// Users must be specified by *ID number* here. To obtain a user's ID number,
// view their profile via the control panel. If this is a new installation, leave
// the first user created will have a user ID of 1. Seperate each userid with a comma.
$config['SpecialUsers']['canviewadminlog'] = '3';

// ****** USERS WITH ADMIN LOG PRUNING PERMISSIONS ******
// The users specified here will be allowed to remove ("prune") entries from the admin
// log. See the above entry for more information on the format.
$config['SpecialUsers']['canpruneadminlog'] = '3';

// ****** USERS WITH QUERY RUNNING PERMISSIONS ******
// The users specified here will be allowed to run queries from the control panel.
// See the above entries for more information on the format.
// Please note that the ability to run queries is quite powerful. You may wish
// to remove all user IDs from this list for security reasons.
$config['SpecialUsers']['canrunqueries'] = '3';

// ****** UNDELETABLE / UNALTERABLE USERS ******
// The users specified here will not be deletable or alterable from the control panel by any users.
// To specify more than one user, separate userids with commas.
$config['SpecialUsers']['undeletableusers'] = '3';

// ****** SUPER ADMINISTRATORS ******
// The users specified below will have permission to access the administrator permissions
// page, which controls the permissions of other administrators
$config['SpecialUsers']['superadministrators'] = '3';

Surely this should all be correct? I'm user number 3, with User number 1 being our PHP/MySQL guy who has no need for any admin access outside of cPanel, and 2 being the user who wants to be removed.