NAMIBIA'S High Court on Monday ruled against a gay couple battling to obtain travel documents for their twin daughters, born to a surrogate in South Africa after authorities refused to do so on the basis the infants were not citizens. Namibian Phillip Luhl and his Mexican husband Guillermo Delgado had already been fighting for citizenship for their two-year-old son when the twins, born in March, were refused the documents required to enter Namibia. Namibian authorities say Luhl must prove a genetic link to the children. In an urgent application to the court, the fathers asked the judge to compel the home…