Wasn’t there recently a big shake up with the rating system, which may have inadvertently caused further ratings issues?
I imagine those issues have impacted the groupings in this tournament. I have not been following those threads closely, but my understanding is that there were major changes to the ratings system, which adjusted a lot players’ ranks, roughly a week before this tournament started. However, major issues were then noticed right around the time that the tournament started, so while players’ ratings will eventually be corrected, the groups have already been set using the incorrectly adjusted ranks.