Professor Utonium says his favorite dish is liver and onion. But when the Powerpuff Girls later serve it to him, he is reluctant to even taste it.
Mojo Jojo is seen clearly getting arrested, then a bit later in the story, when Blossom finds him to be the one to blame for stealing the golf clubs, he is seen doing a hobby (which doesn't appear to be in prison). How'd he get out of being arrested so quickly?