My response was based on international to international transit, without leaving NAIA terminal 1. My take was that the original poster had previously arrived at terminal 2 on a different trip and was familiar with that one, but this time was making a strait transit of terminal 1, since changing terminals was not mentioned.

Based on that scenario, at NAIA Terminal 1, a transfer desk exists shortly before immigration and a stairway is manned to facilitate getting back up to the departure level airside without clearing immigration.