The problem is that our vacation-use form wasn't designed for such a thing, and I needed to modify it to fit this need.
Alas, some well-meaning soul had placed a password on the file that prevented me from adding the extra category.
Since I didn't know who that well-meaning soul was, I went to the all-knowing Google. I found this tip so helpful that I wanted to share it.
Thanks to James Welch at Jameswelch.com, I have the answer.
- Save the password-protected document in RTF.
 - Open the file using your favorite text editor.
 - Find the string {\*\passwordhash ########}, where the ######## represents the password hash. (hint look for the passwordhash portion.)
 - Remove the hash
 - save the file
 
More details can be located here