Some mapfiles and subfolders

In the Mapfiles folder I uploaded some offline maps . When I load the maps, you will see the same. Why?
I also wonder if it is the correct location to load the maps offline, which is this:
OruxMaps -> Archive internal or micro SD (I have a tablet) -> Mapfiles. So I see them, but with the problem I described above.
Finally, I ask if you can load the offline maps in subfolders. Ex: OruxMaps -> Mapfiles -> my subfolder -> ... -> my mapfolder
Thanks.