Broward’s elections supervisor accidentally mixed more than a dozen rejected ballots with nearly 200 valid ones, a circumstance that is unlikely to help Brenda Snipes push back against Republican allegations of incompetence. The mistake — for which no one had a solution Friday night — was discovered after Snipes agreed to present 205 provisional ballots to the Broward County canvassing board for inspection. She had initially intended to handle the ballots administratively, but agreed to present them to the canvassing board after Republican attorneys objected.