Well it wouldn't surprise me if that happens Michael or
On one of the clips tonight.
We learn taht on the 12 hour pit stop on the 10th of december, that charla & Mirna were also told by D & K that they were yielded in season 10.
But the reason fo all the dislike, would appear to be that during that night the three teams happened to watch the current episode of Amazing Race 10. The episode where the BQ's yield Bama.
This makes them out to be not just serious racers (after all the Yield is a tool),but liars not ot just one team but possible all of them.
This could make Oswald & Danny willing to Yield this team as being untrustworthy some thing they might feel strongly about.
It would also explain all the dirty, fake, comments at the condfessionals and during this leg. And why Mirna seems vocally more upset then Eric or even Danielle. And might be one reason why Oswald & Danny are willing to help Charla & Mirna over them.
It also explains all the Karma comments as all teams int hat episode use Karma to describe either the results of that leg, or why they didn't use the yield themselves.