To list the 12th parts report, click on the 12/13 button as shown below:
The 12th harmonic is based upon the Sun / Moon synodic cycle whereas the other is based upon a division of the sign by 13. This is because there are 12 synods of the Sun / Moon in a year. Every month the Moon has to make up another 30 degrees (13th sign) in it's motion to reach the Sun which has traveled 30 degrees in a month. Therefore the dodekatamoiria theoretically represent the Moon's sidereal motion, but there are 12 lunations (dwadasamsa) in a year.
Schmidt theorizes that these represent "outcomes" of the planet.