Funny. But I think I figured it out, based on
this article.
While they stopped using the pandemic method after Cincinnati in August, all tournaments before that won't come off until next year when the tournament rolls around.
This is kind of silly, imo, and leads to situations like Roger Federer holding onto a YE #16 ranking, despite only playing in 5 tournaments. So taking him as an example, here's what he did this year vs. the points he gets:
2021 Tournaments
Doha QF (45 points)
Geneva 2R (0)
Roland Garros 4R (180)
Halle 2R (45)
Wimbledon QF (360)
2021 Points
Australian Open 2020 SF (720)
Wimbledon 2019 F (600)
Roland Garros 2021 QF (360)
Miami Masters 2019 W (500)
Madrid Masters 2019 QF (90)
Halle 2019 W (250)
Doha 2021 QF (45)
So as you can see, he still has points on from 2019, which won't come off until those tournaments are played next year. Also, he's only getting half points for some tournaments. I think the way the system works is that a player gets the best result from 2019-21, although only half points when it isn't the most recent tournament they played of that event (e.g. Roger has 600 points for the 2019 Wimbledon Final, or half 1200, rather than the 360 he got this year for his QF finish; but he gets all 720 points from his 2020 AO SF finish, because he didn't play it in 2021).
So Roger finishes the year at #16, despite earning only 630 points this year, which places him #79 in the Race rankings (thus Holger Rune's complaint; he's #69 in the Race rankings with 713 points earned this year, but finishes #108 with 715 points). Roger enters 2022 with 2385 points to defend, including 720 for his SF at the 2019 AO.
Rafa finishes the year #6, although is #10 in the Race rankings. So to move to him as an example, his 2022 Roland Garros results will replace his 2020 points (1000, or half for not being the most recent year), but his 2022 Rome results will replace 2021 (1000 points), because the system uses his 2021 result because they were more points than 2019 or 2020 would have been.
Rafa enters 2022 with 4875 points to defend, and only needs to defend his 2020 AO QF (360) and 2020 Acapulco W (500) early on.
The bottom line: Ignore the Race rankings; the live rankings are correct, and represent the year-end rankins.