I've never seen a game like that, where MSU was getting seams on every single return. Once or twice in a game, maybe. But not every single time.
In the post game, our coach brought up the punt returns. He wondered if it was the ball getting extra carry due to the elevation change. The elevation in Bozeman is something like 4,800 feet. In other words, he thought your punter was out kicking the coverage. We played a couple other teams at sea level (Cali teams) and Southeast Missouri State (about 450 feet) and none of them served up meatballs right down the chute. Maybe your coverage just broke down at the worst possible time.