[Admin]

This is what you need:
Replace

PHP Code:

$numbersmembers=$DB_site->query_first('SELECT COUNT(*) AS users,MAX(userid) AS max FROM user');
$numbermembers=$numbersmembers['users']; 


with

PHP Code:

$numbersmembers=$DB_site->query_first('SELECT COUNT(*) AS users FROM user');
$numbermembers=$numbersmembers['users'];
$numbersmembers=$DB_site->query_first('SELECT MAX(userid) AS max FROM user WHERE usergroupid<>3 AND usergroupid<>4'); 


I think that'll work.