When Agatha is walking down the road, a wagon with a bunch of kids completely passes her by. However, in the next cut after Sophie gets splashed by mud from the wagon wheels; the same wagon with the kids starts to pass Agatha all over again.
When Sophie first sees Agatha after the wagon filled with kids passes by; the cuff of the right sleeve of Agatha's white shirt is protruding past her coat as she holds her bag. However, in the following cut as they are facing each other; the cuff is now tucked inside the coat and no longer seen.
Yuba, the school woods survival expert, warns his students about "a field of pretty pansies", which besides having dangerous teeth are clearly peonies - that react viciously when the tall gnome inadvertently repeats this insult.