I've tried to lay it out on here before and gotten bashed, BUT here goes and I'll try to be brief:
I've watched the tape many times and I THINK I can hear the official erroneously announce a one-and-one. So, KU rebounds the miss, goes down and scores and the ISU players are standing around like WTF?
IF that is what happened, it becomes something called a "correctable error" for "failure to award a merited free throw." In that scenario, you award the free throw (which resulted in KU fans booing because the lane was cleared and they thought someone had been T'd up) and resume the game from the point at which the error was recognized. Unfortunately, no timing or scoring adjustments are allowed and any action that occurred during the interim stands.
THE MAJOR **** UP was the officials mistakenly awarding 1-and-1 instead of two and, yes, it was a major F up. As far as the correction goes -- and I know no one wants to hear this -- they did handle THAT part of the F up correctly, and that is what I think Self is referring to.
PS: In addition to the error the officials did a HORRIBLE job of explaining it to our bench, resulting in Wayne losing his mind, and justifiably so.