This is more spec than spoiler, but I'll go ahead and comment here.
The final 2-3 teams eliminated (generally the teams eliminated in 4th and 5th place, sometimes in 6th as well), do not go to sequester but travel with production. While they have no further contact with the racers, they generally are given an opportunity to do whatever fun task the racers get to do, bungy or whatever. So those teams literally get to go the same places and do the same things the racers do. They are given clues, and asked to run a leg, with camera crews, just as if they still racing. They are sometimes given extra clues, and told to liberally scatter them around.
In earlier seasons (I know this happened both in 5 and 10 for sure), a team might have been sent to even a different finale CITY and asked to run a faux-leg. I am not aware that the different city has been used since AllStars, however. In season 13, for the first time, at least one team was asked to run a leg even AFTER the finale mat scenes had already been shot, probably due to the unprecedented media publicity in Portland and due to some warnings production received about security breeches.
Last season Mel and Mike did go to sequester (ES), but the teams elim'd in 4th and 5th remaining positions ran decoy. Whether or not the 6th position team runs is variable. Kelly and Christy did run in season 13, which was a blessng as both the 4th and 5th teams ended up with some passport/visa issues.
This time around, both puddin and I have a suspicion that the ES is in Thailand again, perhaps in Chiang Mai this time. So not taking a team all the way there and then turning right around again may explain why we are seeing what we believe to be the team finishing in 6th position running decoy.
IMO, Maria and Tiffany are definitely running a decoy leg. The time difference from the ferry, the posing for the cameras, the fact that the media was allowed to go along and not chased away, but above all the holding of several clues is a give away in my mind.
My guess is that the Netherlands may be a NEL, they go out in Sweden, and then travel with production to Estonian. There is a convenient flight Stockholm>Tallinn that arrives at 1040 AM.