Awww crud. I hate it when that happens! I will go ahead and fix it for a finished version, if that's ok? At least then I might not have to live the rest of life knowing it's in print that I'm a big dope. Oh well, this is the stuff that keeps us humble. Thanks for the pointer.
EDIT: Hold on a sec...now I'm confused for sure: http://dictionary.reference.com/browse/cannons <--- This looks to me like it's acceptable to use Cannons for the plural.
On a side note, seeing what folks are feeling and saying as they cast their votes reminds me of something an Art teacher (who was also a professional artist) told a classroom of students I was among. He said, and I paraphrase, "Whenever you show a piece and it does not do as well as you hoped don't let it get to you. You never know what the judges are looking at. Sometimes they may only be looking at the eyeball and the entire show can be judged based on this one aspect. You could take the same piece to another show and it might win the blue ribbon. Art is subjective so remember that."
Good advice, I think, to anyone entering the challenges. You may not do well this time but there is always next time and the time after that. Just don't give up, the more you do it, the better you get.