So the Mexican hitmen were sent by the higher ups of the guy who was bumped off at the end of the last season (the guy's uncle is the one in the wheel chair in ep. 2) - but the guys who sent them are on the same league/below the chicken fast food store man? Hence how he was able to call it off so easily.
It'll probably end up that Walt starts brewing again for him, now that he's in his pocket. However, he doesn't actually know about the two guys - so he could easily shrug it off. Interesting. It's quite the little cliff hanger!