I have not been following the discussion closely, and Haydn may have already addressed this. But my understanding is that chapter 1 was not published with the text because of paper shortages during WWI. (It was fairly long and primarily historical, setting
the stage for the rest. Husserl or Stein, or whoever made the publishing decision decided it was not necessary for the argument.) I have not looked into this, but I am assuming that this was somewhat standard practice during the war--especially given the
requirement to publish all dissertations in Germany.
A number of people have searched for copies of chapter 1 in various archives, but have yet to find it. This surprises me a bit. I would expect Stein to keep at least one copy--but so far that copy has not turned up, as far as I know.
Great to read in on the group--fascinating topics!