When Brian and Stewie were on the stairs, Brian expressed anger about the burning of a liquor store and the killing of a dog. But when the rest of the family heard that specific news he was in Stewie's room and therefore didn't hear that information.
The guy on Consuela's radio saying "Muchos hornos" pronounces the H like if it's an English word. In Spanish the letter H is silent (When not preceded by a C).