Collaborations - Box Sets

[Joebugs]

I have encountered a new problem with the Collaborations feature.

I recently bought a five CD box set by Santana.

One of the the CDs is Love Devotion Surrender credited to Carlos Santana & Mahavishnu John McLaughlin.

If I use the collaboration feature on this CD it is removed from the Box Set.

Has anybody had this problem!! Is their a solution? to have the "Collaboration" CD part of the Box Set??

Any help will be appreciated.

Thanks

Joe