Hmm, a salvage pass entering this late in this leg is almost unheard of. It wouldn't just work for the Roch/Eji to use the salvage pass to use it to save a team from elimination since Vince/Ed are a strong team.
Come think of it, when I saw AJ/Jody and JP/Kelvin they had paint all over their body, AJ had blue paint on his leg and Team Mr. Pogi had green paint on their faces. Now I know this might not make sense to you but when I looked at Vince and Ed closely, they don't have any sort of paint on any part of their body. Which leads me to think that they really did quit, but instead of sending them home, they placed the Nerds in between AJ/Jody and JP/Kelvin to confuse us, as if the nerds were still the race.
That would probably explain when I went to Iloilo City Provincial Jail, the nerds were nowhere to be seen. They only instructed the nerds to join in the task where there are group of people to confuse us, but when I got to the jail, where filming is restricted the nerds are MIA. They wouldn't just get lost that easily, it's not that hard to find the Iloilo Jail:)