It's a flaw in the ratings system - the game rated 847k on Channel 7 and 69k on 7Mate but because it isn't classified as a "simulcast" when it's on different channels, the ratings aren't combined (MediaWeek and other outlets do a good job at combining these when reporting but other places don't).
Compare that to the Bledisloe Cup which was broadcast live on Ten regardless of timezone last week, so there is no split.
So the figures are not like for like! Showing that rugby league even outdrawing other codes on free to air despite not having this greater number of actual figures being included! Something that should be sorted when doing FTA tv ratings comparisons!