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.
Other mistake: When Jake says "hey dad check it out you can see my room on here" he says it before he has opened the webcam. Could be explained that he could see the program running on the taskbar but as is already listed it's not on the taskbar. (00:20:00)