Deliberate mistake: Bender goes back in time to two minutes before Fry came back to the past. But if you time it, it was actually only 1 minute and 42 seconds.
Futurama: Bender's Big Score (2007)
1 deliberate mistake
Directed by: Dwayne Carey-Hill
Starring: John DiMaggio, Katey Sagal, Tress MacNeille, Billy West
Plot hole: At the end, none of the duplicate Benders that are waiting in the limestone cavern under the Planet Express building have had their Obedience Virus or the time code deleted from them. There should have been only one Bender without the Obedience Virus, not all of them.
Al Gore: Finally, I get to save the Earth with deadly lasers instead of deadly slide shows!