Top of the Lake season 1: episode count

https://www.imdb.com/title/tt2103085/episodes/ It says: "Originally shot and screened in countries such as Australia and the UK as 6 episodes. In the US, the Sundance Channel airing was re-edited into 7 shorter parts." Right now, there are seven episodes listed on imdb for season one of this show. But it states the runtime for episode 1 for example at 59 minutes, which I think would be the duration for the longer Australia/UK episodes and the Sundance one would be around 50 minutes per episode then? So I guess it should be shorter durations or, instead, just six episodes listed with longer durations. I am not sure what the right approach is here. The original screening should be taken into account on what to choose? Anybody have insight here?