Picture Day - S1-E6
Continuity mistake: I'm not sure what type of mistake this counts as, but in here it is. In the episode "Speaking of Cancer" in season four, Jennifer reveals that she has been lying to Jack and Katie about them all having a shellfish allergy for years because it costs too much for them all to eat it, but in the season one episode "Picture Day" Dave puts down a plate and Jennifer says "Ooh are those crab-cakes?" and takes one to eat. Jack was sitting next to her, so he should have heard this and tried to stop her.
Ungroundable - S1-E4
Visible crew/equipment: After Gwenny leaves Alexa struggles to put the bear into her locker and you can see a reflection of the end of the set.
Winter Luau - S1-E9
Other mistake: While Lucas sings the breakfast song, Lori starts filming after the part where he says "Ate my eggs, ate them good" while they are at school. Dylan and Cameron later tease him about how he eats his eggs, but that part wasn't recorded.
Continuity mistake: Ryan wheels Katie away on her chair, but when she walks back into the room later without the chair, the chair is back at the table. (00:14:55)
