just wondering how does SEAS work ?
If you are eligible for SEAS, they will effectively boost your ATAR, but only if the course that you are applying for recognises the SEAS disadvantage. It won't actually change your ATAR or study scores, but the universities will give you a better chance of getting in. They might pretend that your 80 was a 90, even though your certificate still says 80, for example.
I have already applied for it, I heard that once you apply for it you automatically get into access Melbourne?
If UoM recognises the SEAS you have applied for, then you are set to get Access Melbourne. For example, if you went to an underrepresented school that is on the list of schools they published, then you will automatically be eligible for Access Melbourne and will only require a 78 for Arts/Science/Environments, 88 for Commerce and 95 for Biomedicine, guaranteed entry.
Also how does the first round offers work?
Most people get the offer they want in their first round, but sometimes, if you came very close but didn't quite make the cutoff, they will give you an offer for the second round. Don't count on it though: if you're happy with your second preference and they gave you an offer for the first round, then you should accept it.
How many courses do we get offered?
You will only receive one offer per round. So if you messed your preferences up, you have until the 24th of December to change them. Otherwise, they start from your first preference and work their way down. If you decide that you want to do your second preference, but you were eligible for your first preference, then you will miss out. That's why it's important to get your preferences right: choose what you want to do first, not what you think you will/won't get into.