I'm confused - my dd is now formula fed (long story so no flaming please) on dr's orders and I'm making up 4oz of water plus powder. However on the box it says mix 4oz or 120ml with 4 scoops of powder - fine except that 120ml is quite a bit more than 4oz, so if I make up 4z of water it will be quite a bit stronger than 120ml! I thought it was vital to make feeds exactly as per instructions but this is contradictory to me. What does everyone else do?