...When someone shoots more than 60 points worse than their rating, they drop out of the SSA calculation which will then drop the ratings. It's possible someone was borderline, and after the score correction, it pushed them out of being a prop.
Ah. I went back to the results, and it looks like that's exactly what happened. Thanks Chuck.
Now if you could just fix the scenarios where a lower-rated pool of players generates lower ratings than a higher-rated pool with identical scores on the same course and conditions but at different times...