I'm having trouble understanding what you are doing. I suspect you are using terminology that incorrectly. A file name belongs to a physical image stored on your hard drive. A VC shares the file name with the master images and cannot have its own file name. It can have a unique "copy name". So, when you say you "created a VC and gave it a filename" that is confusing me. Did you give it a copy name or did you change the file name of the master image?
I'm also confused by the "click here to see what's happening". When I click there, I get a single Jpg image and I'm not clear on what it is supposed to show me.
Can you also elaborate on what my mean by "containing 4 small images"? Is this a composite where one jpg has 4 different images in it, say on in each quadrant or is that the desired end result?
In the mean time a VC is a "Virtual" copy. It looks and behaves as if it were an actual image but in fact it is just another entry in the catalog that refers to a master image that already has an entry in the catalog. In other words, 2 or more instances in LR (read that as 2 or more thumbnails) point to the same physical image file on disk - the Jpg. But, as LR is a nondestructive editor, that is fine since no changes get made to the actual image file when you edit in LR. Rather LR keeps a list of changes for that image. And, if there is a VC for that image, it keeps two such lists - one for the imported image and one for the VC - and each refer back to the original, unedited jpg image on disk.