Say I've made a map, and uploaded it to my fileshare. It's doing alright on the downloads/likes side of things, but I notice a couple of glithces that should really be worked on. Would it be possible to edit the map directly from my fileshare, without having to re-upload the map and have the download/like counter reset to 0? Let me know if I am making no sense here. Thanks.
As far as I know, it's not possible. You could put a V2 somewhere else in the file share, but editing would make it a new map, meaning it can't be in the same place as an older version; it's not the same thing.
If you edit the map and reupload it then you will lose your download counts and likes etc.. If its any consolation then gameplay and map quality are much more important than downloads so its worth doing. The only suggestion I can make is in future you should subject the map to much more rigorous testing so that when its uploaded no problems will arise.