Anadarko and Clayton Williams both own my mineral interest in same well?

My previous posts here were about Clayton Williams refusing to transfer my father's mineral rights to his living trust. Spent a year giving them every legal doc they asked for. CW continued to stall using "Community Property" saying I had no rights to mother's half. I thought the trust document combined the property. All other royalty payers agreed with me.

Clayton Williams claims they will only sell to me as individual, so I sent an offer and got paid.

I was in the process of selling other royalties to a bulk buyer, and he tells me he can't buy

Anadarko wells because Clayton Williams is claiming the same wells. Example I found was

both claim Gold North Units in A 85 AM Cooper Survey. Long story short, buyer claims the titles are so screwed up, he won't touch them.

Now, I have no choice but to sell to Anadarko, so they can clean up the title claim. I didn't do it, Clayton Williams has some deal with Anadarko.

Has this happened to any body? Is this common? How could they do this??