Politicians from both Labour and National want answers from an Electoral Commission review.
The commission has apologised after our newsroom revealed errors at three polling booths, incorrectly assigning hundreds of party votes.
A polling booth in Port Waikato wrongly assigned more than 500 votes to the Leighton Baker Party that were intended for National.
Labour MP Megan Woods told Mike Hosking that questions need to be asked.
National MP Mark Mitchell says a review under the Justice Select Committee should make sure this doesn't happen again.
He says it's pretty clear there have been mistakes made.
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