I had the same question so I called AADSAS. Yes, they calculate your "AADSAS GPA" based on every class entered. They don't drop your low grade if you retook a class and improved your grade.
which is the exact same thing as entering every grade.. ex.
first class F (0) repeat course A (4) = Average equals 2... my only question is, if the class is 4 units, do you average a 2.0 for 8 units (which means they technically didnt avg anything), or 4 units
It's 2.0 for 8 units. I had the same question and I emailed someone from ADEA. Yes, it is basically like they did not average anything...and the F really really hurt,