Elements 12 Duplicating Folder

Dave2121  wrote I am having a problem where PSE 12 is duplicating folders when I import photos into an existing folder or when I move photo between folders within Elements. The actual file structure (outside Elements) is not duplicated just the Folder List within Elements. Is this a known issue?

I can't say if that is a known issue, I have never seen it mentionned in this or other forums. You would find other discussions about folder duplication in the explorer in particular circumstances, but in the explorer, not only in the folders panel in list view.

When you see the duplication in that list, can you check if a file with the same file name in both subfolder points to the same or to a different path/location?