Regarding Oval's request in the Timeline & Spoiler Summary - matching teams to the start-line photo:
I agree with the ones already matched to their numbers. Here is what I see for the remainder...
Blue African Canadian M/F are 7 & 8
Khaki Backpack M/F are 3 & 4
African Canadian M/F with Dreds are 19 & 20
M/F Hippies are 21 & 22
M/Brunette F are 9 & 10