Polly Wants a Treasure - S1-E8
Continuity mistake: In the scene where Baloo and Kit walk through the Sea Duck's cargo area to try and find who they think is a stowaway, Baloo lifts a crate of fragile crystal glasses over his head. The crate rotates between shots, judging by its red "Fragile" stamp.
Misadventure of Mighty Plumber - S1-E12
Continuity mistake: Right before the woman in the television show for Mighty Plumber goes over to pick up the phone, the receiver is grey, but in the next shot, it is yellow.
Claudia and the Secret Passage - S1-E8
Continuity mistake: Dawn enters the library wearing open back clogs and exits minutes later in white sneakers and socks.