Just before the Monkees go on stage to perform "The Door Into Summer", when Mike stops Davy from leaving, the shot is flipped horizontally. Note that Mike's hair is parted the opposite way and all four of them have changed positions.
Jerry Blavat identifies the West Minstrel Abbies as Harmony, Melody, Caphophone, and William McCochrane. While William Deana Martin is listed in the end credits by her actual name, Daphne, it also credits Sharon Cintron as "Maxine", even though no such name is mentioned on screen.