That's not so much moving the seed line as an entirely different bracket, which was likely ready well ahead of time just in case. The committee likely had to have 4 separate brackets ready depending on the results of Sunday's games (one with Illinois/Georgia both losing, one with Illinois/Georgia both winning, one with Illinois winning/Georgia losing, and one with Illinois losing/Georgia winning). That affects the S-curve itself, not the individual seed-line moves. More often than not, there are very few seed-line moves, only used in cases where a conference team HAS to move to the other half of a bracket (i.e. Marquette this year). The only conferences where seed-line moves would have been forced to come into play would be the Big East with 8 teams, and the Pac 10 and Big 12 with 6 teams each. More often, the committee will move teams along the same seed line to a different matchup within the same seed-line (for example, say Notre Dame and Villanova were matched up with each other on the S-curve...easy enough to shift Villanova over to another 5-12 matchup and move a small conference team into that slot with ND). This is why I am inclined to believe the seed difference is at least as significant as it looks. The closest matchups are things like the worst 2 seed against the best 3 seed (and so-on down with 4-5 and 8-9 matchups).