Arun and Anu Veluchamy appealed from a judgment that ordered them to pay more than $18.5 million for their role in a sophisticated series of corporate transactions that watered-down their mother’s ownership interest in VMark Inc. — from 70 percent to 48.4 percent — shortly before she filed for bankruptcy.The bankruptcy judge determined VMark was worth $57.7 million.At the time of the corporate maneuvers, Bank of America was trying to collect on a $39 million judgment against their father, Pethinaidu …