Continuity mistake: When Fran's date Jack first enters the house, Fran closes the door behind him. A couple of shots later, the door is open and Fran is closing it again.
Continuity mistake: In the scene when Fran is having an intimate talk with Joan, Fran has a cookie in her left hand. Next scene it's an empty glass which she then pours a drink into, then the glass is empty and Fran again fills it. (00:14:10)
Danny's Dead and Who's Got the Will? - S4-E12
Continuity mistake: At the start, when Fran joins Niles, she's holding a green mug in her left hand and a muffin in her right hand. But the mug and muffin suddenly switch hands when Fran and Niles head to the sofa.
Continuity mistake: When Fran's in the kitchen making an ice cream sundae she tops it with a lot of whip cream, but after Fran pulls a tissue out of Gracie's shirt, when she and Maxwell sit down all of the whip cream suddenly vanishes, but then it reappears.
Answer: Mr. Sheffield needed someone to manage the kids, not necessarily babysit them. Brighton was a Bart Simpson type, Maggie was shy and awkward and Gracie had personality issues.