What may also factor into it is that I numbered each team 1-3 for each drafter in the order they were submitted. All #1s got a first-round bye, and people tend to submit their teams in order of strength (purposely or not). Two #3s and six #2s made it through Round 1.
Oh, now I feel dopey, that makes way more sense. (I didn't really distinguish between my first and second team in strength - Smackdown Five or New Day Rocks - but I definitely put my third team third.)