B.G.
Give her time. Some newborns really do eat that often and only small amounts. As they grow and their tummies grow, they are able to eat more at once and eat less often. A better way to measure how well she is doing is to count the number of pee diapers and poopy diapers. If she has enough pees and poops, then just give her body time to mature.
The way your body is responding sounds very normal as well. In the beginning your body produces a lot. As baby eats and body adjusts to baby's needs, your body will produce less.
I would actually take advantage of the fact that your body is producing so much and pump, baby, pump! Stock up! You never know when you might need someone to watch her or you might really need the night off and then Daddy can do the middle of the feedings. That stuff is liquid gold!!! Also, you will feel soooo much better. I would absolutely pump until was empty. Your body really will adjust.