Continuity mistake: When Cleveland walks into the kitchen after being gone for two days, Robert's plate is full of breakfast. A couple of shots later, Robert's plate is nearly empty without enough time to eat the food on the plate. (00:06:40)
Continuity mistake: When Cleveland and Roberta are about to leave the house in the car, Rallo's car seat is seen in the back of the car. But by the time the car leaves the house, Rallo's car seat has disappeared. (00:08:20)
Continuity mistake: When Cleveland finishes his toilet bar, the tools and blueprints on the floor change position between shots. (00:12:40)
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)
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.