That John’s chronology and narrative structure differs from that in the synoptic gospels is well-recognized by New Testament scholars but not satisfactorily explained. A few years ago, I presented a paper at the annual meeting of the Mid-Atlantic Chapter of the Society of Biblical Literature offering a new theory for why John’s gospel is so different from the others. I have now placed a copy of the paper on this site, accessible from either the Abstracts or Writings pages. You can read it from this link.
The topic is far more complex than could be fully presented in a brief time slot and when I finish the current book I am working on, the second volume of Genesis Chronology and Egyptian King-Lists, my next book will fully examine the issues raised in this paper. There is also a more expansive discussion of these issues in my The Case for a Proto-Gospel.