Salam! 4oz setiap 2 jam tu normal je untuk baby 2 bulan plus, especially kalau fully breastfed, dia minum less volume tapi lebih frequent because breastmilk easier to digest. A few of my mum friends pun sama setup, BF malam, bottle during work, and their babies thrived with that rhythm. The fact that your baby is okay with both botol dan breast is actually bagus, means flexible sikit and easier for you dengan pengasuh. Just monitor that wet diapers and weight gain steady je, and if you notice any red flags boleh tanya pediatrician, but honestly sounds like you're doing great!