You are grasping.Under your reckoning NZers voted for change (and I agree there was a bit of a swing) however the results of the poll strongly show NZers didn't vote for Seymour & Peters to be the govt.
National had to form an alliance with them to form a government (which is a symptom of mmp) but it once again indicates your blanket statement of New Zealanders voted for change isn't exactly as all-encompassing of voters as you try to make out.