shreyas:
But it doesn't change the fact that their system is confusing to use. I keyed in $8.00 that day assuming 50c will be added to the total charge, but that was obviously not the case.
But you can't "key in" an $8 amount. The Cash Handling Systems UI is the same across every terminal in NZ - you select a time period, press OK, it then notifies you of the 50c fee and you press OK again.
You've only selected 90 mins parking which would have shown the expiry time, said a total of $7.50, and then notified you off the 50c surcharge. Had you pushed the right button once more after the $7.50 it would have shown a message saying maximum time limit reached and shown the $8 / 12 hour ticket period.