Okay, I have another issue.
I completed the tutorial and fixed the footer tag, then went on to the bonus section.
I got the hero article placed, but the relative position in my page is way off from what it is in the tutorial. In order to get it to display in that area, I have to set the position at -368pixels. I think in the tutorial, it's at 17.
Then, when I get it positioned correctly (?), it only appears on the screen in Live View. Meaning, when I view the page in a browser, the hero article disappears.
What's up with that? :-)