I was just checking the D3 scores page, trying to figure out what happened. It was still listed on USCHO's schedule for 7pm Sunday when I checked the Saturday results.
Traditionally, when a poster made a timely but ambiguous pick, I've made the earliest possible legal interpretation of that pick their official pick. If we noticed before the lock, we tried to get that poster's attention to provide clarity, but if we noticed after the lock, my interpretation stood. Since you were relying on USCHO's own schedule, I think you are entitled to that benefit.