Fellow Aussie here, I sent an email to Canberra (don’t bother calling they never answer, email response was prompt) I asked if my flights would impact application and got a response - I then included a copy of the email in my application. I was only extending for 30 days though. Thought I’d share incase it was helpful
I’m an Australian. I emailed the Embassy in Canberra they were really good at responding. I think they only work in the mornings - I never had any luck with phone calls either.
I applied for a 60 day visa and had a question about it - I included a copy the email with visa application.
sorry I’m not sure. I can only say that there was a couple with two kids at the Embassy, while I was there, the Dad looked like he only had one appointment sheet for the 4 passports - and all of them went up to the counter.