Music folders/files are added to iTunes Media folder instead of Music subdirectory
I recently migrated my iTunes library between hard drives on my Win10 PC (iTunes version 12.11.4.15) . After copying all content, I launched iTunes with the Shift key held down and was prompted to specify which database file to use, selecting the "iTunes Library.itl" file in the new location. Judging from iTunes Preferences, the path to the iTunes Media folder updated properly (see screenshot). Also, when viewing Song Info for individual tracks, the File tab displays an accurate pathname to each one (utilizing the new drive letter as well as the Music subdirectory beneath the iTunes Media folder location).
These preferences match those in use when my library was on the previous drive, and importing CDs had always placed the resultant folders/files into the \iTunes\iTunes Music\Music\ subdirectory as expected. However, now these folders/files are being added to the \iTunes\iTunes Music\ directory itself, which is the root level of the iTunes Media path specified by Preferences.
I'm a bit confused as to why this behavior changed and have had no luck attempting to determine the cause from researching other support posts. Please advise as to any possible remedy. Thanks!
Windows, Windows 10