I woulda thought this would now be over, but here is the punchline! I just got a call from a supervisor at AGR, who apologized for the several different answers I had been given. She had been asked to call me by the AGR Insider, for whom I left a private message several days ago. She said the routing is a permissible 3-Zone award, even with the overnight, and to always ask for a supervisor when these controversies come up! Her name was Marian.