This is exciting! One day left!
I think that U&J and R&K are doing the same task. Have no idea what they are doing, but I don't think that they are showing two different tasks... we see Kelly with bamboo and is messing with rocks. It's hard to tell if she's banging what looks like a rung of a ladder in, or is trying to 'gore' the rock with the stick. And what the heck is Ron doing in that shot? It looks like he's messing with other large bamboo polls, and then it looks like a long line of parallel bamboo polls in the distance...like a bamboo train track. Then there is U&J with what seems to be gloves... perhaps its something they have to do at the end, requires gloves? Who knows!
Theory about the golfer in the preview... could it just be perhaps a shot from the beginning, where Phil says something like "now the teams are heading to sunny Jamaica, home of world renowned golf courses" (LOL) like a little come to Jamaica golfers! commercial. heh heh . Though I do agree, I like idea of a "dive or drive" detour, but we only see one team member jumping, which seems like a Roadblock to me, and then we see the rafting/doing odd things with rocks and bamboo which seems like a detour.
I can't see the limbo being another roadblock, because that would be te 12th roadblock, and I think they would save one for the mainland and the final part of the finale. So, perhaps it's just a task to get a clue, like someone else mentioned. Hopefully only one person has to do it though... the limbo would be really tough for the men.