Hi Sarah,
When I asked my GP the same question you are asking now, she answered same as Liz - your baby knows how much she wants to eat, ignore the charts. If I would feed my LO what it says on the formula pack, I'll have a starved LO.
There are quite clear signs she will give you if you are overfeeding, she'll turn her head from side to side, try in different ways to take the bottle out of her mouth. Don't worry, she'll let you know.