Are you going back just because of the CFO ?

1) You dont need to attend unless they didnt put a marked on your passport stating you didnt attend the CFO when your last departure,i dont think its necessary,because you already flew,they only can hold you at the immigration,lucky for you huh! they just let you fly
2)Nope,that is only for filipino
3) your passport with visa on it
4)you dont need to book,its everyday seminar,come there if youre still interested ,before 9am
5)Took half day,yes you can have the sticker right away,just 3 hours will do...
6) nope,just carry on with your status