I for one am thrilled they didn't stop. I don't think it makes them even the slightest bit vindictive. Me yes, them no! Since team A&A had started last, it was definitely legit that they would have assumed A&A were still in last place and now they were in second to last by passing them. They would have been kicking themselves if A&A would have ended up passing them in the end and they would have been eliminated.
Go hottie twins!