Cain can still compete against high school; however, she isn't competing for her school. Mary and her coach are both making sure she does everything to guard both her current high school and future college eligibility.
It would have been a HSR however the 9:02.10 was run on an oversized track which isn't eligibe for the 3000m high school record.
MARY shocked me because I definitely didn't think she could run 9:02.10 and win; therefore, she probably could have gone slightly faster if required!
In response to the OP
Baxter vs Cain
800m......Cain
1500/Mile.Cain
3000m/2m.. 90% Cain
5000m.....very slight favorite for Baxter