No need to make the second post for the HP drabble collection.
For the second, you're posting a rewrite of your own work. This happens all the time. Most of the time, the rewrites are posted as you are doing, where the original was downed by the user for various reasons, and the author opted to rewrite and repost.
The only ones where I'd need notification (and yes, ultimately those end up with me) are for where an author is rewriting something they already have on site, so that once they've gotten everything they want from the original, I can then merge the stories so the hits, rates and reviews are not lost when the old one is deleted.