Another question is why the "th" in the top isn't superscripted but at the #2 point, it is.
I haven't read through the whole thread so I don't know if someone's answered you yet but:
Frequent users of Word know that if you make a mistake like leaving out a "th" and use the arrow keys to go back to the spot and type "th" then arrow back down to where you were, the "th" will not automatically superscript.
You have to type the "th" and then hit the spacebar to make it auto-superscript.
You can try it if you have Word 2000 or higher. Type "111 Fighter" then use the arrows to go back to "111". Type the "th" and then use the arrow to tab back over to the end of the sentence: the "th" will stay "lower" script.
I think the forger of the document forgot the "th" and went back and fixed it without hitting the space bar to set the superscript.