Continuity mistake: Singing her part of "Been A Long Day" song, Smitty is at the first "Now she's thinking..."; Rosemary is holding her folder with her arms positioned differently, and Smitty herself first has her arms crossed, then her right arm is straight and she crosses it only in the second shot, and in the next cut her arms are both down, and then again up. (00:39:25)
Continuity mistake: When the secretaries start their dance getting set to work at 9 AM, the cord of the typing machine of the first one runs in front of the table in the establishing shot, and behind the table after she changes to the flat shoes. (00:11:25)
Continuity mistake: Finch gets inside Mr. Bratt's office. Meanwhile, Rosemary has brought her friends over, and they watch him come out of the office as a new employee. Throughout the scene, the people in the background change without consistency between camera angles.
Continuity mistake: Finch's window washing companion fully soaps a window that is completely foam-free in the reverse shot where Finch gets into the building. (00:04:25)
Continuity mistake: Finch just started working for the company. We see at 9 sharp the secretaries, who all are wearing high-heeled shoes curiously of the same beige color, change them slipping in more comfortable ballerinas of a variety of different colors. The coffee break is announced a couple minutes later, and all of them storm the food cart wearing again their beige high heels; the colourful flat shoes are nowhere in sight. (00:11:25 - 00:12:50)
Continuity mistake: During the musical number "A secretary is not a toy", when the line "employed to do a gavotte / or you-know-what " the secretary in purple (third one in the left wing) turns her head facing straight ahead, and she repeats the gesture in the next shot. (00:35:30)
Continuity mistake: Ponty gives the flower to the boss' secretary saying it cries out to be given to her. In the background there's another secretary with a light blue dress, and a man in a suit that walks in the corridor. Cut, and the secretary changed position and the man vanished. (00:19:20)
Other mistake: Ponty follows the instructions of the titular book, which follows the logical progression through the corporate ladder. However, when he becomes VP of advertising, he is reading from the very first pages.