To anyone who says they can't reject based on eligibility reasons after AIP: YOU'RE WRONG.
I received my AIP on 17 August, got refused on Eligibility reasons on September 03. It wasn't a glitch AIP or anything, I received it in the GCKey portal. After AIP, absolutely NOTHING about my application changed. I was going to start the Fall semester online, my medical was passed months ago (June 25) and I had submitted a complete application (biometrics done) too! No forged documents, nothing. Grades OK, course choice was also logical from my previous studies (BS CompSci from uWindsor). Still got rejected on eligibility basis. Now, it's been 21 days since I've ordered my GCMS notes and so far I haven't received them. Eager to know what their reasoning is.
Call this fake or whatever but that'd only be you giving false hope to yourself. I'm not being discouraging but saying they "can't" reject after AIP based on eligibility reason is not true at all.