The shortest syndication in the history of the universe. (Be aware that I don't want to tumble in hyperbole here.) I upgraded to Blogger Beta. I fiddled around with feeds. I changed to a new template that already had the feed code in it. And then I was warned that my e-mail address was popping up with every post syndicated.
So I've taken both my e-mail address and the Atom feed out. That should solve the problem.