Polls have a margin of error which is why you can't rely on an indervidual poll but when you look at a number of polls from diffrent source over a period of time we can see a trend and clearer picture of voting intention.
The trend we have seen from July one is a clear fall in the LNP 2PP and Abbott as prefered PM to the piont that on 2PP it's bacical neck and neck. Newspoll had an improvment on Abbott as prefered PM but we would need to see more polls showing the same before we could dismiss it being a rouge poll.
Still as I will say again, 8 months to go and anything could happen
