Other mistake: When Rodrick and Greg bought groceries, there was one bag of "Cheez Curlz" and it ended up in the hot tub at the motel. They weren't shown buying another bag yet they had one when the pigeons "attacked."
Other mistake: During the final fight, apparently Mrs. Potts can hold dozens of liters of boiling water inside herself.
Other mistake: When Boss Baby drools on the file at Puppy Co. he is not nearly close enough for the drool to hit the file.