Hello,

Can I ask how exactly you are determining that features are duplicates?

For example, for this camera POI https://www.openstreetmap.org/node/9442716021/history , the location here indeed has two cameras on either side of the shop doors: https://www.mapillary.com/app/?pKey=2787369721427048&focus=photo 

Please review your edit(s) and restore any features that you deleted that are not in fact duplicates.

Thanks