kansas vs. UNI illegal substitution?

[CoachFred]

Please correct me if I am wrong. I was shouting at the tv and haven't rewatched it, so I might not remember exactly, but this is how I remember it.... UNI was taking the ball out close to the end of the game under Kansas' basket and Kansas substituted in their pressure defense squad for their offense squad. UNI threw the ball long and it went out of bounds without anybody touching it. Kansas then was able to take the ball out of bounds underneath their basket. They then substituted back in their "offense squad." No time ran off the clock. I thought that once a player leaves the game, time must run off the clock before he can re-enter. I am suprised that the UNI coach didn't catch this, I believe that Kansas scored on that posession as well. Did anybody else notice?