This is the post you seem to be ignoring. It shows me posting a link to refute your statement. My link has the year 2006 included whereas yours seems to show the difference for 2001 to 2011 and even then goes against what you are trying to state which is "No Religion" is reducing in the population. I also showed how the ABS seems to disagree with your notion that "Not Stated" was absorbed by "No Religion", look at my table.
Don't forget christian religions are falling as a percentage of the population.