This is why I buy CDs and burn them and THEN never, ever let iTunes see the original library files. There's a #WeirdAlYankovic song "Couch Potato" on Poodle Hat that iTunes deleted from my library because of a copyright dispute between Al and Eminem. I OWN THE CD, i have a PHYSICAL COPY of the song but iTunes deleted the file from my computer. I never let iTunes see my library again and use #VLC instead.
Also if you want Couch Potato in your rotation just name it something different, it will play anyway and if iTunes catches a whiff of your files it won't know to delete a missnamed file.
Nerdfest
gzt