Something over 8 hours ago, someone at Stanford started applying an integer function to the listed stats totals. So people went from say 250.2 points -> 250 points. That is an illegal match because stats totals cannot go down. So the stats code decided a ton of people departed, while people of the same name but slightly lower totals joined.
There are several ways it can be fixed. I'll look into it.
Edit1: should be taken care of. I've rolled the stats back about 12 hours to rematch the data, they will catch up in a few hours.
Edit2: enabling slip correction for this project only fixed about 40% of the problem matches. I'll take another crack at it tomorrow night.