Night auditor was running the overnight audit when you got there. Still they are supposed to be paying attention to what is going on in the lobby during that time. Be happy you got the first night refunded by Hilton, if you didn't have status you probably wouldn't have gotten that. Learn the lesson, check in on the app before midnight and call the hotel to verify you are still coming so they don't sell your room and mark you as a no show. Honestly somewhat surprised they honored the rest of the reservation since you no-showed the first night.