What do you mean by the "final page"?
I can get right through to the payments page doing a dummy booking over and back in PE
Of course the website is updated live - but Air NZ do have a tendency to add and remove A class fares often on a daily basis. I had an example a few months ago I posted on here where they would appear from around 3am until 10am every day for probably days in a row before disappearing for the rest of the day.