Purchased 12/31/19 first change 08/24/20, certainly possible factory fill was done 4 mo prior to purchase, not sure of build date. However second change was 05/19/21, 9 mo and ~9,400 mi OCI. Third was 18 days short of a year and almost 100 mi over 10k
Don't for get that there's some wiggle room in ppm figure. For example your current and previous Al readings may be well within the standard deviation.