Honestly - don't worry! If you are feeding to appetite and if she asks for extra you give some then you are doing fine. Is she draining her bottles? If so add another oz into them so she can take it if she wants. If she was hungry at night she would wake for it, it sounds like she is edging towards dropping the night feed.
Keep an eye on her weight, but if she is alert and happy when she is awake, producing wet and dirty nappies and meeting milestones you have no need to worry. My DD was a real chunk, 91st centile from a couple of weeks old (and still is
) but she very rarely took more than 25oz in a day, your DD is taking 28-32oz a day (plus a NF some days) which is absolutely fine.
Babies don't really increase their total feed amounts after a certain point, feeds get bigger and more spaced out rather than more frequent smaller feeds. When they start to need more is when solids get introduced to supplement the milk they have rather than replace it before they are 1.
HTH!
Laura
