Click the "edit image" link to add your title and other information.
(Again, this link may be towards the left or right of your screen, depending on your display resolution.)
First make sure that your image title is not displaying an unwanted group name underneath, such as "CSLR Challenge", "Konica Minolta Users", etc.
If that has happened, it means that you forgot to log out of that other challenge account before uploading to the STF Challenge.
You'll need to delete the image (from the right side of its own Edit screen), log out of the other account, and then repeat the upload from scratch.
When doing this, verify that "login" is displayed at the top right of the gallery window, but do NOT click on it. Just click "edit this gallery" directly.