This is important, as Madeline has a habit of getting lost. It's not even her fault, really. She's an accidental dimensional traveller. Madeline has gotten lost in a port-a-pottie, in that she emerged after doing business in a completely different world, outside a completely different toilet.

The part where she is incontrovertibly stupid is important here, as she is convinced she just doesn't have a good head for directions. As far as she thinks, she has never left her home 'dimension', she's just gotten lost many, many times.