iTunes changes name of albums automatically

Hello there,

I have a little problem with iTunes.

I don't know why, but iTunes is altering the album names of my library.

For example i have the album "Nick Jonas" and "Nick Jonas (Deluxe Version)" as I want them to be separate. But when I start listening to songs of "Nick Jonas", iTunes automatically puts it in "Nick Jonas (Deluxe Version)". It happens it to me with all this kind of albums and also with singers name that have duets.

How can I avoid iTunes to change the names autommatically?? It is very annoying as it affects to my scrobble at Last.fm.