Harder, Better, Faster, Browner - S2-E1
Character mistake: 21 seconds pass between the time they start to write a song and Kenny says "Done". Cleveland then says it was 15 seconds when it was 21 seconds. (00:11:05)
Harder, Better, Faster, Browner - S2-E1
Continuity mistake: When Cleveland is spinning the basketball on his finger, we can see the lines of the basketball whilst he is spinning. In the next shot, the lines aren't seen anymore. (00:01:35)
Harder, Better, Faster, Browner - S2-E1
Other mistake: Donna starts drinking Tyler Perry Presents Wine. The drink level remains the same whilst drinking it. (00:07:35)
Harder, Better, Faster, Browner - S2-E1
Continuity mistake: When Kenny gives Cleveland and Donna a thank you gift, he places the box on the edge of the table. The box moves back two inches without being touched as soon as the shot cuts. (00:07:05)
Harder, Better, Faster, Browner - S2-E1
Continuity mistake: Just before Cleveland tells the Browns and Tubbs that Kenny West is staying in his home, he kicks the door down. It disappears off the ground when Bruce appears in the scene. (00:06:05 - 00:06:35)
Harder, Better, Faster, Browner - S2-E1
Continuity mistake: In the scene where Kenny drops Candace off at Cleveland's, he starts overexaggerating about Barack Obama. His hands are raised in this shot but they are by his side in the following shot. (00:03:55)
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.
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.
The Essence of Cleveland - S2-E18
Continuity mistake: When Cleveland takes the tape out the camcorder, he starts writing. In the first shot, he's only just started writing, but in the next shot he is at least 70% of the way through writing. (00:12:00)
To Live and Die in Va. - S2-E17
Continuity mistake: When Rallo tells his friends the farmer's daughter joke, the friend on the right is wearing white shoes. However when Rallo says "Oh man. Murray and his friends are so lucky their mamas are dead", the right friend is now wearing black shoes. (00:10:50)
To Live and Die in Va. - S2-E17
Continuity mistake: When Cleveland Junior tosses the cereal on the floor, the position of the cereal changes when Cleveland goes to put it under the fridge. (00:11:45)
Continuity mistake: Cleveland Junior's pots and pans suit causes loads of damage to the kitchen. Yet as Donna walks into the kitchen, there is much less damage. (00:01:00)
Continuity mistake: When Cleveland suggests Tim should take in Robert, the four beer bottles in front of them change position between shots. (00:10:00)
Other mistake: The block of apartments that Robert lives in is two stories tall. Yet a few seconds later Rallo says "Man, we're three stories up". How can they be three stories up if the block of apartments is only two stories tall? (00:04:05)
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.