Holy shit, your qualifications are really good.
I got a CGS-D (Plant and Animal Science) with 2 papers submitted (both first author, small journal), 2 papers published (one first author, big journal, one third author, small journal). First year phd. However I really tried to buff up my leadership portion because I knew that this wouldn't be super competitive with other Ph. D. students in Biology.
I do know that they are supposed to apply a weight based on how long you have been in graduate studies, so I wonder if that makes a difference? I'm not entirely sure what you mean by "8 years of experience in Canada" but it's possible that stressing that point made them grade you harder.