MIAMI — For the first time since the All-Star Break, the Miami Marlins have won more than two games in a row. And it was three swings late that ensured they would keep the lead in a 5-1 win over the Houston Astros on Monday at loanDepot park to begin a three-game series. Couple this win with their wins against the Yankees on Saturday and Sunday, and the Marlins (63-57) have won at least three…