Bobby tells the Ewing Energies partners that Cliff's mother, Rebecca Wentworth, left the company Barnes Global to her three children (Cliff, Pam and Katherine) upon her death. However, this isn't true. In the original series, Rebecca Wentworth inherited her husband's shares in Wentworth Industries and wholly owned the subsidiary company Wentworth Tool & Die. In 1982, she bought a small oil company called Luce Oil and asked Cliff to run it for her, which he renamed as Barnes-Wentworth Oil. Upon Rebecca's death in 1983, Cliff inherited complete ownership of Barnes-Wentworth, while Pam and Katherine inherited her shares in Wentworth Industries. The three of them also inherited a third each of the Wentworth Tool & Die company. In 1984, Cliff sold his share of Tool & Die to Katherine when he was short of cash (though somehow he seemed to have this back by 1987). After her car accident and subsequent disappearance in 1987, Pam gives Bobby her power of attorney for all of her Wentworth stock, presumably to be held in trust for their son Christopher. In 1988, Cliff sells Barnes-Wentworth to West Star Oil, at which point the Bafnes-Wentworth company ceases to exist. He later obtains full ownership of Ewing Oil as the original series ends in 1991. At no point, however, did Rebecca Wentworth create or have shares in the company that became Barnes Global as she was long dead by the time of its inception.
When John Ross is looking at Rebecca Wentworth's last will on his laptop, it says that she is "espoused to Digger Barnes" (Cliff Barnes' father). Firstly, Rebecca was not married to Digger by the time she wrote this will as she left him over 30 years earlier. The will was obviously written after Rebecca had been widowed by her second husband, Herbert Wentworth, and had reconnected with her two eldest children, Cliff and Pamela, which was in 1981 (Digger died in 1980). Secondly, "Digger" was simply a nickname that Cliff's father had. His proper name was Willard Barnes. A legal document such as a will would reflect this.