Also remember a few schools, Kirksville especially, require their recommendation sheet to be used with or without a letterhead letter from your sources. So make sure your recommenders are on board, especially your D.O. who is a busy (wo)man. You can turn the Supp around in a night( you know the essay question-Why do you what to be a D.O. or simulacra) and proof read!! If you have above avg. grades and MCAT you stand a fair chance for an interview. But, even if this is not the year dont be discouraged. Just be sure to get as much D.O. exposure as possible for the next cycle. One more year really is not that big a deal in the big picture.
Good luck!!!!