Exactly, it becomes a runaway self feeding sort of deal due to the extreme design elements.

Center of Pressure isn't used anymore for varous reasons. The Cm pitching moment took over from it since, as I understand it, the results are more consistent. With the old CP deal there's a point where for each airfoil at it's zero lift AoA the CP is infinietly to the rear of the airfoil. And for some reason engineers hate things like infinite values....