Here's another theory: (OMG I SHOULD STOP LOL IM TOO ANXIOUS AND HOPEFUL)
Logan & Chris win the leg.
Kelsey & Joey finish 2nd, with Justin & Diana right on their tails.
Justin gets a penalty. (the crying in the first part of the Preview)
Justin & Diana wait on the side (like in the Preview).
Tiffany & Krista arrives, they think they're last (the crying in the Preview), but then Phil calls Justin over and eliminates them.
If Justin & Diana get time penalty (most likely), they have to wait near the pit stop right?
My speculation:
Justin & Diana 3rd place, get time penalty.
Tiffany & Krista 4th place, when they run to the pit stop, they saw Justin/Diana and know that J/D get penalty. When T/K arrive at the pit stop, Phil ask J/D come to the mat and tell them that T/K also get time penalty. Justin collapse in a big sigh of relief because he's still in the race and T/K eliminated.
I HOPE I'M WRONG. If this happened, i'm done, kthxbye....