A taped "X" on Ben Turpin's neck, used by Charlie to strike a match against, disappears when the gag is over.
When Chaplin wants to enter the room, the other person waiting pulls him back on his leg. Chaplin loses his hat. Yet, when he enters the room in the next shot, he has his hat back on.
When the leading lady leaves the office, she has her muff on her left arm and the contract in the right hand. Yet, when she enters the anteroom, she has the muff on her right arm and the contract papers are gone.