Continuity mistake: When Cleveland notices the family and neighbours are there for his intervention, we can see Arianna and Holt standing right next to each other. In the next shot, Arianna is in visible but there's no sign of Holt. He was too close to Arianna to be out of frame. (00:09:35)
Continuity mistake: When Cleveland sees everyone in his bedroom, Arianna's bracelet changes which arm it is on between shots. (00:09:35)
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)
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.