Opening times?
All of the articles I read over the weekend about this said that the store usually opened up at 8am but mistakenly opened the doors at 1am on Friday. It wasn't until 9am that some people reported to the police that the store was open and unstaffed so that's 8 hours it was open, not 1.
http://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=10721082
http://www.monstersandcritics.com/news/asiapacific/news/article_1634746.php/Self-service-at-supermarket-which-opened-itself
http://www.stuff.co.nz/nz-newspapers/west-coast-6013/news-6662/4920204/Good-Friday-free-for-all-at-Pak-n-Save
There seems to be a lot of confusion amongst different news sources about the details. Not really that important I know but I can't risk someone being wrong on the internet.