Everything is set to normal; thanks for your attention! Will be glad to correct in case of similar issue!

I see now! this was a project mapped with our team; that why you can find different usr mapped this tile and yes I did mapped some building on this tile! sorry for the duplicated maybe it was just a mistake we maid that time! but I am updating this tile in few minutes it will be okay!

Hi, could you open the tile in Josm? theses building were not even mapped by me! Maybe I was the last user to modify this tile that the reason! They're not that big let me fix the issue!

I think the time I mapped this tile they were no duplicated buildings! How could I even upload duplicated building without having an error message in Josm.

Hello user_5359; It's the plastic/ metallic thing on roofs that traps rain water.