You have two editors on the page. One is set to go to the root upload folder, and the other is set to go to a /files sub-folder... so it is only showing images in the /files/files directory and there is only one image there. You can see the other editor goes to the root /files folder with all of the images.
You can correct that in the settings or in the code, just find this on the page: &startup_folder=/files
and remove it where it occurs.