I would have thought that they would use the BCAPL racking rules. They are below. Are you sure they were not using those rules?
2-2 8-Ball Rack
The balls are racked as follows (see Figure 2-1):
a. in a triangle with the apex ball on the foot spot (AR p. 78);
b. the rows behind the apex are parallel to the foot string;
c. the 8-ball is in the middle of the row of three balls;
d. the remaining balls are placed at random, except that the ball at each rear
corner of the rack must be of a different group from the other rear corner
(left/right orientation those two balls does not matter). (AR p. 96)
They are except... or in addition too -- the balls on the outside are to alternate (solid, stripe). The issue is if you do that the corner balls end up being the same SO.. you then switch one of the corner balls so that "item d" is not violated. Which is what Corey forgot to do....
A lot of fuss amounting to less than zero IMHO