iBooks and Page Numbers (Real or Location?)

Dear Apple Friends,

I have a pretty candid and straightforward question about iBooks and I'm hoping some who have used it for a while can help me out here.

I normally use my Kindle for my e-books but have been finding some books on the iBook Store that I'd like to buy for my iPad. I e-mailed iTunes my questions and they cannot seem to give me a straight answer so I thought I would try here next.

• Do e-books on the iBook Store (iBS) use static location numbers, or are they dynamic based on the page, text size, etc?
  
• Are there "real page numbers," or page numbers that correspond with the print version of the book? (Kindle has this, I use it a lot for research stuff). I cannot find a mention of it anywhere on anything.
  
• What sort of "return policy" does Apple provide on the iBS? Like I said, I cannot find a straight answer on this and iTunes Customer Support has not given me a straight answer. I'd just like to know if I buy an e-book and it has typos (this has happened a lot on Kindle) in it or the quality is just very poor, what are my options for returning the book?

Many thanks, in advance.

John