Hi Elfie.
I think the photos in that forum have already been added to the database and some one has posted a comment to the photo. That places it in that list of photos in the Photo Forum.
I see you have added a new photo to the multi plant photos. If you remove it from there and enter it in the database it will show up on the home page under the single plant photos entered into the database. Then if some one post a comment to your photo it will show up in the Photo Forum.
Let me know when you move it. It is a great photo and I would love to know what it is. I will post a comment to it as soon as it shows up in the database.
Hope I made sense in explaining?