If you're travelling together then you don't need any 29 day visa extension at the airport or a 59 day advance visa from the Embassy.
As you're married to a Filipino citizen your wife just need to ask for a BalikBayan Stamp in your passport when presenting yourself at the Immigration Arrivals point. The BalikBayan stamp is good for 1 year and is free of charge.
Just have your marriage certificate readily available.
Best practice is to approach the desk togather and ask the Immigration Officer for it before handing over the passports.
If you're not arriving together better to secure the visa from the Philippine Embassy beforehand.
It's not uncommon to have the terminals switched in these days or reconstruction. Some terminals are not equipped to issue 29 day extension visa