Continuity mistake: Sue says that she "matured" aka got her period, on Sept 21, but in the episode "Forced Family Fun", when they go camping and she gets it, they go before school starts, which is well before the end of September.
Continuity mistake: When Frankie is going crazy lying on the floor because of all of the stuff still in the house, objects move around as the camera shots get closer to her, look at the VHS tape on her left.
Continuity mistake: When Frankie finds a shampoo bottle in the middle of the garbage, she puts it under her arm, and then it disappears.
Errand Boy - S2-E8
Continuity mistake: After Frankie and Brick get soaked at the car wash, when they're in the bathroom, the towel around Brick keeps flipping between its dark stripe side and its light stripe side, depending on the angle of the shot.