Good point Marc, that makes sense. The 0230 departure time is, I believe, timed to accommodate the Air Tahiti Nui flight which comes in from JFK on certain days. If the sailing had originally been published in the brochure at 0230 based on ATN schedule at the time, then ATN changed their schedule, and there was no JFK flight arriving that day, the sailing time could have been revised and published in the actual documents. That's the most plausible explanation so far!
Dena