(purely speculation)
Teams checking in at the same time usually arrange themselves in the order of
Higher ranking on the right of the screen , lower ranking on the left (If the pit-stop greeter is on the right of phil)
Example : Leg 2 (2nd - 4th), Leg 10 (3th - 5th)
Higher ranking on the left of the screen , lower ranking on the right (If the pit-stop greeter is on the left of phil)
Example : Leg 9 (2nd - 3th)
From the preview cap, we can find that the pit-stop greeter is on the left of phil
So, we can suspect that Kelsey & Joey, Justin & Diana and Tiffany & Krista are 2nd, 3rd and 4th respectively? (Consider that Chris looks happy)