In the opening scene, the kids play a trick on Andy by putting chocolate pudding in his slippers. In a close-up, pudding can be seen oozing out the sides and back of the slippers. In the subsequent medium-length shot, Andy pulls off the slippers and pudding is only around his toes. His heels and soles are completely clean.
When Cheryl and Jim agree to three days of her silence, it is just before they retire to bed for the evening. When the time elapses, it is clearly not night time, as Andy and Dana are over and sunlight can be seen through the windows/doorway behind the characters.