homestead,
For either an hour or a day (not sure which way it is set) after uploading a photo, you should be able to edit and delete one of your photos. After that, because of an incident that occurred a few years ago you will have to ask one of the moderators to do it for you. Same I think for threads and posts.
If you will post a link here to the photo in question, one of the moderators will look at it and probably delete it for you.