The Colorado game was filled with problems at the end including the fact that the officials realized their mistake, conferred on the field for a very long time and still allowed the play to stand. The touchdown should have never counted in the first place because the Colorado QB is down before he crosses the goal line. He puts the ball in the end zone while he is on his back and then they count it as a score.
Finally, after conferring on the call and allowing the TD to stand the officials then make the insane decision to force Colorado to try an extra point. There was no time on the clock, so the game was officially over. If the kick was blocked, Missouri could have ran it back for a two point coversion to tie the game. However, Colorado just came out in victory formation and took a knee like any sane team would do and there was no chance for Missouri to score.
The other element to this is that Colorado went on to win the national championship that year. Oklahoma St has no chance, so the stakes are different. The CMU game was the misinterpretation of an obscure rule. I doubt anyone in the stadium knew there was a problem and the problem didn't surface until some rules wonk in some office somewhere spent time analyzing it. The Colorado mistake(s) was obvious to everyone in the stadium.