Other mistake: When Jake is sitting on the couch talking on the phone, he says out loud "we were on a train in a tunnel?" etc, Alan has not walked into the house yet, therefore could not hear Jake's phone conversation. However when Jake walks past Alan and continues talking on phone, Alan states "at least he isn't the tunnel." Alan was not inside at the time of this conversation, so it makes no sense that he would have heard Jake say this.
Add timeMelissa Bostic
Continuity mistake: As Alan runs away screaming about betrayal, Berta begins to pour Charlie a cup of coffee. Charlie's first two or three fingers are hooked through the handle of the cup. The shot changes and Berta is still pouring but now Charlie's index finger is alongside the rim of the cup.