The post is copied below in case you prefer to express your opinion in a comment. I'll collate all the votes into a blog post in about a week from now.
How do you feel about giving up copyright on your short stories?
If, once you've sold a story, you're happy for the publishers to do whatever they like with it, then select 'all rights are fine'.
Giving up all rights includes losing the right to reuse the story yourself in any way or ever profit from it in the future eg claiming ALCS and royalties in the unlikely event it's turned into a Hollywood blockbuster. Although publishers usually will put the authors name in by line they won't be obliged to they could even use someone else's.
If you'd like to retain some rights yourself, such as the moral right to be identified as the author, and to profit from further use of the story other than by the publisher you sold it to, select 'Want to keep some rights'.