Continuity mistake: Roberta goes to leave the house and she starts a tug of war with Donna. They are standing next to the door in this shot, but standing next to a table about 15 seconds after. (00:04:45)
Continuity mistake: Cleveland's beer bottle suddenly appears in his hand in the shot after he says "Poor, fat Kendra".
Continuity mistake: Cleveland goes outside in The Hurricane and gets blown all over the place. Yet reporter Dwayne Meighan is shown reporting the news outside in The Hurricane and is totally unaffected by it. (00:05:40 - 00:06:10)
Deliberate mistake: In this episode, it is revealed Donna and Robert got together because Robert saved her from a water fountain. In "Another Bad Thanksgiving", it was shown Donna's sister introduced Robert to Donna. (00:02:20)
Continuity mistake: The amount of snow in the window keeps changing when Rallo first meets Murray.
A General Thanksgiving Episode - S4-E3
Continuity mistake: General Ritcher says Holt couldn't join the army because he has to be 5 feet or taller, indicating that he is shorter than 5 feet. But in the video Holt made of why Cleveland should take him to the ball game in the episode "A Short Story and a Tall Tale", Holt said he was 5 foot 3 and a half. (00:20:20)
A General Thanksgiving Episode - S4-E3
Plot hole: Holt and General Ritcher could barely even hear each other when they are in the plane due to all the wind blocking the sound. but General Ritcher is somehow fully able to hear Holt when Holt is saying "You've got to get me closer" despite being a further distance. (00:18:05 - 00:18:45)
Ain't Nothin' But Mutton Bustin' - S2-E10
Continuity mistake: The bullet hole in the Waterman Cable van at the start changes position between shots.
Another Bad Thanksgiving - S2-E7
Continuity mistake: When Cleveland reads Holt's twitter updates there is a leaf on the staircase banister behind him. In the next shot, the leaf has disappeared.
Other mistake: When Terry is saying he doesn't like being strangled, he doesn't have a reflection in the van's wing mirror. (00:14:30)
Audio problem: When Kenny begins rapping, you can actually see him open his mouth but nothing's actually coming out. (00:16:05)
You're the Best Man, Cleveland Brown - S1-E21
Other mistake: The clock on the nightstand doesn't have any hands on it when Donna is talking about women loving bad boys. (00:07:40)
Continuity mistake: Ernie's position keeps changing in relation to Junior at the first election. (00:04:50)
Other mistake: Terry and Aaron are seen behind Tori when Donna finds Cleveland having Frapps with Tori. But when the Frapp Attack video is played later, there's no sign of Terry or Aaron. (00:08:05 - 00:09:00)
Continuity mistake: When Cleveland says "We were just at work and it was just so boring and humdrum...", Tori is looking at Cleveland and Donna. But when the video is played later, when Cleveland says "humdrum", Tori is looking away from Cleveland. (00:08:10 - 00:09:00)
Continuity mistake: When Donna "frapps" Cleveland, there is Frapp on the floor. Cleveland then slips on the Frapp and it disappears into the grass. Two seconds later, it reappears on the ground. (00:08:20)
Plot hole: Several angles of the Frapp Attack video would have been impossible for Rallo to shoot. The "ow, my bottom!" angles come from a wide shot, but Rallo was never standing in such a position when it actually happened. (00:08:05 - 00:09:05)
Continuity mistake: When Cleveland gets hit with the American football when he walks into Waterman Cable at the start, he is standing next to the entrance door. In the next shot, he is suddenly standing at least 20 feet away from the door. (00:02:00)
Continuity mistake: Junior's inflatable scout pants go over the waterfall twice when he saves Rallo. (00:19:35)
Continuity mistake: The tree the scuba diver is impaled on changes size between shots when everyone runs out of the courthouse. (00:14:40)
Answer: In the episode "A Rodent Like This" Rallo discovers that Cleveland Jr. is actually a secret agent who is tracking down Tim, who is actually criminal. Jr. reveals that in order to get close he had to eliminate the real Cleveland Jr. luckily Cleveland doesn't pay attention so it was easy. Whether or not this is canon or not depends on the writers.