I too was puzzled with the finals results. Some bands obviously performed much better in the finals than they did in prelims. Just find it hard to believe there wasn't even one change. Here's how I had the finals.
1. Marcus
2. Coppell
3. Martin
4. Centennial
5. Lone Star
6. Liberty
7. Wakeland
8. Carroll
9. Heritage
10. Lewisville