I always played Tracey as a super overcompetitive Slytherin Quidditch player cause if the movies can break the stupid only boys on the team canon so can fucking I haha.
Margo is from an episode that aired in early 2017 so basically I just say she knows canons from before January 2017 (to make it easier on myself to remember rather than trying to guesstimate when she was in Fillory and when on Earth in late 2016 cause... why make it hard on myself tbqh) so she'd not know that period of The 100 anyway! So basically the "newest" canon she knows is stuff like... Rogue One.