oh, it looks like I wrote that script, so let me try to answer you ;-)

You can try to replace this line:

    add_filter( 'comments_template',    array( $this, 'comments_template' ), 9 );

with this one:

    add_filter( 'comments_template',    array( $this, 'comments_template' ), 11 );

or some higher priority, in the `init()` method of the `PingsList` class.