If the baby is peeing enough for you to change a few diapers a day and pooping at least once a day, and if she is keeping her weight in the normal ranges, she is fine.
I feed my daughter 2oz .
I did the same thing with my son, then ended up moving up to 4oz when he was a few months old. He drinks milk and eats everything now and he's 1. Bahahaha he's my little fatty