To get the extended visa at Manila, you need to go to the immigration desk, as normal, tell them you want to extend then you look to your left to a doorway, it is behind a pillar, so you may miss it. Go through the door and you will see some people behind the desk. Just ask for an extended visa, take a seat for 10 minutes pay the money and all done. From there you go back to the immigration desks and they stamp you into Phils for 59 days. Job done.
hth
