At first I added it as anonymous, then I logged in and "resolved" that.  It should last 7 days.  Then I tried to re-add it as logged in, but the stupid interface put the pin in the wrong location, and I can't delete that.  Then I re-added it in the right location.  Then I noticed the edit button, so hit edit, and zoomed in as close to the center of that coordinate as I could.  What an annoying process!  Hopefully this time I got it right.