The reason that we leave the message twice is to ensure that the patient receives the full message. Because there are so many variables with answering machines (makes, models, pre-recorded messages, length of record time, etc.), there are times when a message may start and the machine is still playing the out-going message. This will result in some of your message not being communicated. By playing the message twice your patients will never complain that they did not receive the full message.