In the first commercial as Mary McMertz (Vivian Vance) is directing an audience member (Lucille Ball) to come forward, she is giving the directions, "you there," "that's right." For whatever reason during these directions another "you there" is edited into those directions and not matching the mouthing of Vivian Vance.
At the end when Lucy and Ethel have their shopping carts loaded up with salad dressing they forgot one thing, the stairs! It would be incredibly difficult, if not impossible, to get the loaded up shopping carts down the stairs of their apartment building, especially while wearing roller skates.