It was in the rules somewhere.... (although I forgot about it too and luckily had the ones listed I wanted to send).
E-mail them and ask if you can make the change. They may let you do it - especially if it is not something significant. With how screwed up things were this year, I think they have gone out of their way to help fix any problems they could, as best they can.
Kegged/Serving: Porter, Session IPA, Dark Mild
Bottled: Barley Wine, Sour Belgian Golden on Cherries, Sour Cherry Stout
Primary: Double Citra IPA, American Brown Ale, Oatmeal Amber Ale
Future Brews: Heady Topper Clone, Porter, Ordinary Bitter, Dortmunder, Pilsner, Scottish 70, More...... More....... Beer.......