Community Auth Issue

hi Skunkbad, can you help me ?
i have ( 3 ) three problems in different case.
1. After install and create user "skunkbad" in Community Auth, i still can't login. the limit login error still count.
2. in the other case i can login with same step installation. but in this case i wanna add new "level" and "role", but i can't, im try editing file application/config/authentication.php. lets say im make it :
$config['levels_and_roles'] = [
'1' => 'subscriber',
'2' => 'contributor',
'6' => 'editor',
'9' => 'superadmin'
];
then i try to echo $this->auth_role the result still 'customer'.
3. The last issues, i wanna set authentication value with dynamic setting by Admin. lets say i wanna set:
$config['max_allowed_attempts'] = setting_admin('limit_login'); but no setting change. then i try to echo setting_admin('limit_login'); i get DUPLICATE output, the right output is 100, but i get 100100.