我用这个 SQL，分页为什么每次会重复一条呢？ [ 2.0 版本 ]

$hot_new_by_adduser = Yii::$app->getDb()
    ->createCommand("select count(*) as count,al_add_user_id from ar_list GROUP BY al_add_user_id HAVING count > 8 order by count desc limit ".($page-1).",6")
    ->queryAll();