(October 7, 2015, 11:54 AM EDT) -- WASHINGTON, D.C. — A California appellate panel erred when it refused to enforce an arbitration clause contained in a cable provider’s customer agreement, the attorney for the cable provider argued Oct. 6 before the U.S. Supreme Court (DIRECTV, Inc. v. Amy Imburgia, et al., No. 14-462, U.S. Sup.)....