That is interesting, I was hoping it would be different, but not sure how exactlyNo it won't. The original map will stay as it was produced by person X. If you change the map and upload it the updated map will be owned by you.
For that to happen there would have to be some sacrifices made, if another person made changes to that park how world they merge the 2 files? You would either have to not allow changes to the file or always overwrite what was done with what the owner of the file has. Neither of those options are good IMO so what would be the point