我在用户页面中添加了一列，当复选框不在正确的位置时就会出错。这是我的代码，你能帮我把复选框移到正确的位置吗？

public static function user_register_columns( $columns ) {
    // create a new array with account just after username, then everything else
    $new_columns = array();
    if ( isset($columns[\'username\']) ) {
        $new_columns[\'username\'] = $columns[\'username\'];
        unset($columns[\'username\']);
    }
    $new_columns[\'account\'] = self::__( \'Account\' );
    $new_columns = array_merge($new_columns, $columns);
    return $new_columns;
}
public static function user_column_display( $empty=\'\', $column_name, $id ) {
    $account = WP_ABC_Account::get_instance( $id );

    if ( !$account )
        return; // return for that temp post

    switch ( $column_name ) {
    case \'account\':
        $account_id = $account->get_ID();
        $user_id = $account->get_user_id_for_account( $account_id );
        $user = get_userdata( $user_id );
        $get_name = $account->get_name();
        $name = ( strlen( $get_name ) <= 1  ) ? \'\' : $get_name;

        //Build row actions
        $actions = array(
            \'edit\'    => sprintf( \'<a href="#">\'.self::__( \'Manage\' ).\'</a>\', $account_id ),
            \'payments\'    => sprintf( \'<a href="#">\'.self::__( \'Payments\' ).\'</a>\', $account_id ),
            \'gifts\'    => sprintf( \'<a href="#">\'.self::__( \'Gifts\').\'</a>\', $account_id )
        );

        //Return the title contents
        return sprintf( self::__( \'%1$s <span style="color:silver">(account&nbsp;id:%2$s)</span> <span style="color:silver">(user&nbsp;id:%3$s)</span>%4$s\' ),
            $name,
            $account_id,
            $user_id,
            WP_List_Table::row_actions( $actions )
        );
        break;

    default:
        // code...
        break;
    }
}

非常感谢。