Shrink It Up - S2-E1
Continuity mistake: When Rocky is saying things that she has been pushed into doing, she mentions the time they danced on the wings of a plane. However they didn't do that until a few episodes later.
Continuity mistake: Before grandma tells the first part of the story, Flynn has kiss marks all over his face. After the first time it goes back to real life, the kiss marks are gone.
Continuity mistake: When the kids jump in the shower towards the end of the episode, they're all wearing footwear. When the shower is turned on and we see a wide shot immediately after the kids get wet, the boy is now barefoot and there is no sign of his trainers anywhere in the immediate area.