1. It seems that there is quite a bit of duplication of functions in the API Reference.


    If you're referring to Chapter 29, API Categories, that's entirely intentional. Please refer to that chapter's opening paragraph.

    If you're referring to Chatper 28, we are not aware of any duplicates, and if they exist it was unintentional. Please be more specific with page numbers, etc. so we can add it to the Errata if this is the case.