When the sink at Katie's house overflows with mud, Ned wipes his hands on his shirt, but the smudges on his shirt change between shots.
Ned says Katie started working at the dance studio 6 weeks ago, yet the family hasn't signed a lease and Delia says she needs to drop off the keys at the rental property. No landlord would allow people to move in without having signed a lease, and the family couldn't have lived there for 6 weeks without keys. Delia also acts like having the lease signed and dropping off the keys are two separate errands; she wants Ned to do one while she does the other. But she would be able to have them sign the lease and drop off the keys at the same time.