Current Leap Day sale exposes some pricing issues for AirNZ:
WLG-AKL F $90 Seat, earn 3 SP 1 $AP
WLG-AKL K $79 Seat, earn 5 SP 1 $AP
You might expect there to be a consistent pricing structure & price increment across all the fare buckets F->P…B->Y (for the same product).