L.S.
Every baby has its own schedule. They don't read the book so they don't know that they're supposed to nap according to someone else's schedule. LOL.
It's good that you recognize that it's normal she's not sleeping through the night so early on and that you are feeding here when she's hungry. Honestly, it sounds like she has a good sleeping schedule (even for the most part during the day) and, if she were my child, I wouldn't be too concerned.
Toss the Babywise would be my advice, and fast. There are much much better books out there that rely on scientific data no less. The Babywise author has no credentials in sphere of pediatrics or child development (he's a minister who never finished his undergraduate degree and who has since been kicked out of his churches no less).
Look into Happiest Baby on the Block. The dvd and book are usually available at the library. The methods and techniques were a life saver for us. Also, No Cry Sleep Solution was also invaluable for its insights and research on babies sleeping patterns.
Good luck!