I used those months as random examples

That shows enough that you don't understand and you're just basiclly shouting "i'M a ViCtIm oF RoBo DeBt"

I was on a student allowance as well and I finished university, was still getting my student allowance and forgot to update my Centrelink status when I got a job. Lo and behold, now I owe money because I earned more than I was supposed to as a student... on student allowance... with no job.

Like I said, it is based on FINANCIAL YEAR. That is 1st July to 30th June for us, if you haven't already figured it out. Get to know it, it's important.

I had to pay back quite a bit myself because I was lazy and forgot to update Centrelink and took advantage of some the $200 bucks a week coming in.

I don't get how me being on student allowance and getting help, and then me getting extra work later on and still reporting that work and thus getting less during those weeks, means I have to pay back the money they gave me when I earned less.

Buddy, tax brackets. Learn them. You're just coming across as a fool right now, that's acting like anyone that's ever received a note from Centrelink of overpayment is a victim of robodebt.