you'll get your baby bonus (both installments) together fortnightly over six months. the only way to not do this would be to not register one baby until six months down the track - and therefore not getting ftb for that baby either until you register it.

you will get both ftb and bb fortnightly - you will initially get both payments same day but you can ask to have your ftb payment moved to the opposite week (you can't change what day baby bonus payments are received)