UPDATE: Many thanks to John Cardoso, who read about my plight and figured out how I could fix it. From John's letter: "1. Go to your Google Profile. 2. Click ABOUT, which is next to the edit profile button in the upper right. 3. Under about Emily there should be an introduction text section; click the pencil icon to edit that. 4. Click OK once changes are complete."
There was a 24-hour delay while the whole shebang updated, and my changes were reflected on the blog. Yay! Bazinga! Success! John is da bomb. : )