Continuity mistake: When Cleveland first sees Tim, Holt and Lester outside, they are standing side by side parallel to the porch. When Cleveland goes outside, they are standing perpendicular to the porch. They are standing side by side parallel again when they show him the suit.
Continuity mistake: Cleveland throws two cushions on the floor and tells Donna he has gambling fever. When he throws the cushions down and falls back, the first cushion has an extended part to Cleveland's right. In the shot after Cleveland falls onto the cushion, the extended part has moved to the top of the cushion.
Other mistake: Cleveland spent several seconds trying to turn off the TV repeatedly pushing loads of buttons and manages to turn it off. The button he turned it off with was the same button he kept repeatedly pushing, meaning the TV should have turned off seconds ago if he was pushing that particular button.