I've a question about the online booking system too.
I've been looking at a trip January to March 2017 and having pricing problems, the trip in question is CDG-HKG (24/01) - HKG-AKL (29/01) - AKL-HKG (13/03) HKG-CDG (16/03), the online booking system gives 2 prices for these dates (circa €3628 and €3733) when proceeding to select the flights the pricing reverts to €5420 and not the two amounts at the top of the page! I've tried changing the dates around but it makes no difference so why show the €3628 and €3733 prices if you can't select them?
I've also tried the "actual date" route instead of the +- 3 day option and that comes out at over €10k for those dates!!
I haven't tried calling MPC or reservation yet as we haven't firmed up on the dates but does anybody think that that's worth try and might that elicit yet another alternative price?