A customer asked: How do I achieve a smooth transition from red to purple, see below:
ANSWER: Purple (magenta) is below BLUE in the Hue spectrum.  However, since red is both at the Top and Bottom of the Hue, it is possible to do what they want.
Here are the steps:
1) Turn off “Lock adjacent breaks”
2) For the bottom left RED, do this (choose the RED color at the bottom of the Hue spectrum (Hue = 360) so that the transition from Red to Magenta does not interpolate through the rest of the Hue spectrum (yellows, greens and blues)
This gives you this output.