I have a feeling that the was spelled wrong intentionally because it was written by the children who knew "The Great Bambino" as a hero, but not "unimportant" things to them such as the way to spell his name.
That Babe Ruthe thing is done on purpose! It's supposed to be there! It's in there so that it's more suspenseful. If Smalls' mom saw the ball she'd know they lost it.
Not a mix-up. It's clearly done on purpose because if you listen to Smalls in the background while the ball is being written on you can clearly hear him say, "Baby Ruth-e?" as if he knew it was spelled wrong.
That's not a slip up! If you listen closely, that was done on purpose. A fifth grader (or whatever grade they're in), doesn't always have the greatest spelling. Plus, they comment about how it sounds like "babie ruthie".
later :)