The current distribution of seats is not based on population numbers, whereas the distribution of your source is based on the UN survey 2014, which is widely accepted amongst all Somalis. Puntland doesn't control anything in Sool and as for Sanaag the capital and two of three major districts are under Somaliland (Badhan district isn't even fully part of Puntland).
The FGS and most reer konfur (except Majeerteen) always held the position that the 18 regions shouldn't be splitted, hence the seats of shared regions were allocated to the Majority. In other words, Mudug for Galmudug and Sanaag for Somaliland, no matter if Harti live in those regions. In the end of the day it wouldn't change that much. Around 10 seats more for Puntland.
Anyways i couldn't care less for this, but im surprised the FGS used the survey of 2014. If this is true, I'll admit Farmaajo has balls.