In "Tom, the Babysitter", when the babysitter is first shown, the sleeves to her sweater are turquoise like the main part of it. For the rest of the episode she appears in, they are yellow.
When the babysitter first picks up the telephone, she presses five digits and then the conversation begins in the next second. In reality, a person using a telephone is first required to press seven digits to call his or her recipients within the same area code, but 1+ the 3-digit area code and then the last seven digits if calling someone from another area code, then wait to hear a signal of the recipient's phone ringing, and then should the recipient pick up the phone in the next few or so seconds if they answer in a timely manner.