Recently I imported some photos into a newly created album and it never placed the new album into its parent (2011) album on the left. I repeated my efforts a few times and found a command "move into folder" (having right clicked on the 2011 folder) I tried this but even tho it appeared not in this folder, it was in the file, its just not how it appeared in LR. so I fiddled about a bit and thought I was rebuilding the folder tree, and unfortunately found myself putting all my photos into the 2011 folder with no subfolders between them 
Is there anywhay I can undo this at all, without moving thousands of photos again?
