They might have made a mistake. I'm a Canadian student, and when I sent my transcripts in, they used a different system to compensate for the discrepancies between American grading and Canadian grading. For example, a semester with a 84.9 average got me about a 3.83 or so GPA. And a semester with a 87 average got me a 3.9 something, etc. So your 82 and a 3.7 sounds about right. Call LSAC and ask them about it; explain you're a Canadian student and ask why they used the American GPA conversion system on you. They might need a grading key from your school to explain how the mark breakdown works, so maybe talk to your school about it as well.