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. (00:09:30)
Continuity mistake: Nothing is on the couch (except for a cushion) when Cleveland creeps into the house. A remote suddenly appears on the couch a few seconds later. (00:09:15)
Continuity mistake: At the start of the church ceremony, Junior and Roberta are present, so it must be a weekend because they would have to be at school on a weekday. Later that same day when Cleveland is washing a mule he says it's Wednesday when it should be a Saturday or Sunday. (00:10:50 - 00:12:20)
Other mistake: Donna's friend Yvette stabs a man's hand with a knife when his hand was placed on a table. Yet no damage is made to the table. (00:11:30)
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)
Other mistake: When everyone is saying goodbye to Cleveland and Cleveland Junior, they are standing next to Cleveland's house. Then after they have left and Stewie says "What the hell? He's getting his own show?!", they are standing next to Peter's house. Cleveland's house however, is across the street from Peter's house and could have not been able to stand next to Peter's house if they are at Cleveland's house. (00:03:20)
Audio problem: In the final scene when Cleveland says to Terry "I'm gonna get paid and you're gonna get laid", they both start cheering. But when it comes to the wide shot, Terry is still cheering but his mouth isn't moving. (00:19:55)
Continuity mistake: When Terry crashes the van into a lamp post, the wing mirror smashes. But after Cleveland has his flashback and Terry looks into the wing mirror to spot the police, the wing mirror is now intact. (00:13:05)
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.