I can see how a football fan could get confused and think Quantrill came from Columbia. I find it surprising and disappointing that a multi-million dollar athletic department at an institution of higher learning did not apply even the most modest level of quality assurance that would have been sufficient to ensure what they promote as history is in fact the truth.
In case you're interested, linked below is my amatuer's take on the Missouri Tigers moniker and the civil war era miltia unit (with a big assist from Kirby Ross and the information he posted on this board a few years back).