I have run across the problem before that wordpress will not prevent the creation of duplicate slugs on our site. My business partner recently wrote a blog post with the same name as a page on our site and wordpress did not prevent the slugs from being the same which caused a little bit of confusion. This week something similar is happening, but I can't find the source of the problem.
My business partner once again has written a blog post that is scheduled to post on this Thursday (1/10/13.) The slug showing on her blog post is: http://www.journalinabox.com/trim-tip-14/ But, as you can see if you go to that link, this slug is already showing on our system. It looks like it is a media file, because instead of "Edit Post" as an option up on the menu bar, I am given the option to "Edit Media." But, I have searched every nook and cranny of our media files and can't find this slug. Where could this be hiding? I'm hoping to find the problem before Thursday so that her blog post will post correctly.
I'd rather not have to change the slug of her post as this is an ongoing series on our blog and I need users to be able to look up these Trim Tips easily based on the slug.
UPDATE: After a little bit of looking at the source code for this slug, I can see what post id# it is tied to on our site, but can't find that post id anywhere. There is no trash link showing for our posts, so I can't search there. I did search through trash for pages and there is one item there, but it is not related to this post or picture. Still confused...hopefully on the right track?