We arrived back to mainland Australia after a seven-hour flight from New Zealand.  When we started the process of going through customs, we were flagged and unable to use the automated entry machines despite not having any problems using these when we entered the country the first time after arriving from the States.  We were then escorted to a separate (and off the beaten track desk) where we proceeded to be questioned by the customs agent.  She wanted to know exactly where we had been in Australia and exactly where we would be spending the next two months.  We also were asked to provide our outgoing flight information and details about our credit card limits and how much cash we were carrying (I had exactly $15.00 Australian dollars in my wallet!).  Once we answered all the questions and she entered them into the system, we were free to go!  My goodness, they do not want us to stay any longer!  Ha!