Charlie Brown is seen setting off for the spelling bee with a suitcase and a duffel bag. Upon arrival, he only has the suitcase. Upon return, the duffel bag reappears, but when he gets home, it's only the suitcase again.
Linus and Snoopy are entering the theater where the Spelling Bee is held from the interior of the building. When Linus tells the usher he's a friend of one of the contestants, they are shown going inside from the exterior.
When the other boy is asked to spell "leisure", he says the letter "f" instead of "s" while spelling the word. Because he spelled the world incorrectly before Charlie Brown was asked to spell "beagle", he should have lost the spelling bee and Charlie Brown should have been the winner.