The crease IS NOT halfway between the existing creases. Fold the near large triangle down. Note that a small roof-shape is visible, because Step 27 was not halfway between creases. Fold the tip back up, along the hidden crease made in Step 27. Fold the tip down along the hidden crease made in Step 28, so the new tip is slightly beyond the old tip.
Valley fold the tip down on the existing crease.
There is an extra flap on the tip. Fold this flap into the pocket. Fold the near layer of the tip in half. Fold the rear layer of the tip into the hidden pocket, to match the crease made in Step 35. Repeat Steps 34-36 on the left.