Your CSR is the average of your last 12 TCSR's.
When we add up your 12 TCSR's and divide them by 12, you get your CSR of 1594 (for this example) on week Oct 13th.
This person played on week (Oct 20th), they won, which game them 11 points (1575 + 11 pts), but since it's the average, it dropped the"first" week of the 12 weeks, which was 1617 which was higher then 1586 of week Oct 20th).