I too was under the impression they got the clue at the batu caves (from my faulty memory of names of places

) that said to go directly to the pit stop. Perhaps it was edited down to that, but considering how far behind they were (and the other teams had all checked in by the time the sun went down, while U&J arrived at sundown/dusk), it wouldn't make sense for them to complete the tasks. I think this is the same thing they did in Season 1, when Team Guido got stuck at a Pit Stop and by the time they reached their next clue box, the race had been won.
I've been rooting for the BQs all along - I kept

last night at Eric and Danielle (and Eric's "tantrum" of ripping up the large picture of D&K - what did that
really accomplish?)
I agree that I'd only feel like my time was invested "wisely" if Team Cha Cha or the BQs win - I'd be ticked off if it's Team Schmirna or Team ED