Error gives man bigger lotto win A Louisiana lottery winner credits a mistake, Cashier $1 million lottery mistake for his big lottery win. Robert Thibodaux Sr., would have only won $200,000 if it wasn't for the mistake, robert thibodaux sr 1 million he won. Error gives man bigger lotto win, $1 Million Lottery Winner Credits Cashier's Mistake. Man Says Clerk Upgraded Ticket. A Louisiana lottery winner says a cashier's mistake made him hundreds of thousands of dollars richer than he should be. Robert Thibodaux Sr., of Thibodaux, Louisiana, on Thursday claimed a $1 million Powerball prize at the state's lottery headquarters, an amount five times greater than it would have been had a clerk not mistakenly upgraded his ticket, he said. "I'm a lucky person -- I won a lot of money. But this lady who sold me the ticket is a big part of this," Thibodaux said Thursday at Louisiana Lottery headquarters in Baton Rouge. Thibodaux, 70, matched five numbers in the October...