They would have topped up for sure. Even if the gas was loaded for LAX-BNE they still wouldn't have been able to go the extra distance to AKL-BNE without putting on something extra.
especially considering the earlier post
the weather in Brisbane was a bit too marginal today for the fuel the aircraft had. Tempo Low Vis and passing heavy showers all day. I suggest it was a refueling stop, to cope with that.