Gathering compression deduction from royatly check

Hi. I have mineral interests in Loving County. Anadarko was the producer but since they have been purchased by Occidental, I have noticed a change in my royalty check. Occidental is deducting Gathering/Compression and Processing Related Fee from my monthly check. Anadarko did not have these deductions. The impact to my monthly check is significant. Just wondering if others out there have seen this deduction.