ITunes songs are in 2 different folders...trying to consolidate but "consolidate" button is not working?

Question

I have iTunes running normally and great on my Imac, all playlists work and various ipods synching properly.  I am planning to copy my entire Itunes folder to an external drive so I can recreate my itunes on another computer (I have done this before).
In surveying my folders before the move, I checked the size of my iTunes Media Folder (where all of the songs should be) and it was only 24GB.  Strangely, I found that the remainder of my songs (190GB) are in a folder called "Library" which at the same level as the iTunes Media Folder within the iTunes Folder.  This could possibly be from me having had my original itunes library on an external driver years ago but no matter the reason, I would like to clean up the file structure and get the songs back to the iTunes Media Folder where they should be.
In preferences I have both boxes checked for organizing the library. I then clicked Consolidate. They computer seemed to go through every song but after an hour everything remained the same.
Does anyone know the best way for me to actually move those songs from the "library" folder back to the iTunes media folder without screwing up my playlists?
Incidentally, it's the version of iTunes that would have been most current during summer of 2012.

Answer 1

Consolidate copies files that are outside of the designated media folder inside it, connects iTunes to the new copies and leaves the originals behind. Occasionally file permission problems may prevent iTunes from creating intermediate folders for the path it wants to use and files can end up somewhere else the user can access, e.g. Library or Desktop folders. (N.b. my experience is mainly with Windows)
Have you checked some typical entries in iTunes via Get Info > Summary tab to see where the file in question is actually stored. Perhaps iTunes is no longer connected to these particular files which is why nothing changed.
tt2