You can do two core and two flexible but not those that have a prerequisite like ECON1102 (Macroeconomics) or ACCT1511 (Accounting 1B). Yes, you can do the other core next semester.
Re: urrh this is extremely strange. I got accepted into this course when my atar is l
They felt sorry for you. Jokes, maybe you received some form of bonus points.
Re: [HELP]Problem with registering my unipass, saying 'not all required fields filled
I'll advise you to remove that image or at least black out personal information.
It is definitely a possibility because according to this http://www.uac.edu.au/documents/atar/2013-main-cutoffs.pdf, there are still vacancies for the course.