Based on the stats you've posted, your DAT is average to theirs but your GPAs are below their averages, and also you're Canadian. All of these factors had an influence, not just the fact that you aren't SDA (neither am I, I believe in a small "brown" religion too). I got an interview before my spiritual letter was in, and was accepted shortly after my interview. It's a SDA school, but they won't reject you for not being SDA- there are many factors that go into interviews & acceptances. Just putting that out there.
For everyone else, theoretically all you need is one interview, and many of you have more than one! I've talked to a lot of people on here and in real life, and some of them have had only one interview, or even none at all. Be grateful for the interviews you've received (you deserved them!) and learn from the rejections and move on. Good luck! Y'all got this