Kelsey & Joey to Justin & Diana's right and Tiffany & Krista to their left.
Logan & Chris nowhere to be found near them.
One thing to analyse is the DRAGON BOATS.
During Kelsey & Joey and Tiffany & Krista's part, they are moving to the RIGHT.
During Justin & Diana's part, the boats are going to the LEFT from the yellow flag at the far right seen in Tiffany & Krista's Pit Stop scene and seem to have completed their circuit to the RIGHT and is now going back.
Logan & Chris are seen with the big shrubery behind them like Kelsey & Joey. They clearly either check in much earlier or much later.
My spec?
Logan & Chris are Team Number One.
Kelsey & Joey are Team Number Two.
Tiffany & Krista are Team Number Three.
Justin & Diana are the last team to arrive.
However, if there is a Speedboat task this leg. It may also well be the other way around.