The problem isn’t that only one image is found that CellProfiler doesn’t know how to match the images to create image sets so just shows you it’s best guess. The default behaviour is for there to be the same number of files for each image, all matching each other. It doesn’t know that one of your images is a partner for all the other ones. This behaviour is something that took me a bit to understand. There’s a few threads on the forum about similar stuff - this one is an example: Variable image types for analysis?.
To try and illustrate, I put 4 images with the same names as yours in a folder called “test” and pulled that Folder name out using a regular expression in the Metadata module.
Then in the NamesAndTypes module I changed the Image set matching method to be Metadata and set the Matching as below. The top row needs to be what the images you want to match have in common and then the next row needs to be something the separate images have a unique Metadata entry for.
As I say, this can be a confusing so let me know any questions you have.