assign user role only update og_user_roles table but not user_role

I use og_user_roles module to assign user role when registered users join a group or create a group. I'm trying to assign "authenticated group user" role for join a group and "group owner" role for creating a group. However, it only updated og_user_roles table but not user_roles table.

I did try to trigger an action as well. It did run the code in function views_bulk_operations_user_roles_action() in user_roles.action.inc and function user_save() in user.module.
It did come in to the code below: (in user_save() function)
foreach (array_keys($array['roles']) as $rid) {
if (!in_array($rid, array(DRUPAL_ANONYMOUS_RID, DRUPAL_AUTHENTICATED_RID))) {
db_query('INSERT INTO {users_roles} (uid, rid) VALUES (%d, %d)', $account->uid, $rid);
drupal_set_message("DEBUG: views_bulk_operations_user_roles_action: did come here 2 ".$rid); //Proof that the roles loaded as defined in the action
}

Still not updating user_roles table. Could anyone tell me what's going on? I miss something?

thank you in advance