I don't know specifically about your stories, but I do know that if authors are issued warnings for a story and don't respond within a certain amount of time, admins will delete them. For example the wrong rating, posting a rating you are not old enough to post, bad formatting like walls of text or all caps, too long of ANs, ANs written as chapters, chaptered stories that don't meet the required minimum word count. There are others as well. You can find more information
here.
As far as Spark goes, no one can edit their stories anymore. The site closed down years ago. All that our link is is an archive to what was already posted at the time of the shut down.
