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)
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.