It's okay to go back and fix typos n such, just don't go back after 15 and add another 2/3 to the story. LOL
I know how much typos can bother people. *giggle* I can still see the post time on the entry and this isn't as strict as the 48 contest.

This whole contest is about teaching yourself to sit down every day and give yourself permission to think creatively and type your thoughts. Hopefully the habit will continue after 15 days.

48 is different in that it gives you specifics and forces you to think about the structure of the story.