It IS confusing Novie.
The whole damned website is confusing(and I'm an ex-civil servant, and reasonably intelligent).
Overseas applications are taking up to a year or more, incidentally. Every Phils document is checked and re-checked for authenticity... shuffled back and forth between Liverpool and Manila (or wherever... but overseas).
I don't understand all this interest they've taken in you, as the child was born in the UK , with a British dad ?
Certainly when I/we applied for my first son's passport (also born in UK to Filipina mother)... it was a normal standard application, I'm pretty sure, though it's 20 + years ago now.