@batman thanks for the reply. I received CPAA's reply just now. Ito daw po ang reason:
"We follow strict guidelines set by the Australian Government Department of Education and Training, Country Education Profiles, and determined the level of your qualification from your second school against the Australian Qualifications Framework (AQF), as this institution falls under the Grade Point System it is determined by your average grade overall, therefore depending on the Average grade and where your score falls on the scale this qualification can either be an Associate degree or a Bachelor degree, and therefore as we can only consider content from qualifications at a Bachelor degree level it is unfortunate that we cannot consider your subjects from your second school."
Given this, I think my next step is to take the FAR foundation exam.