
Quoted from "GarySandstorm;513303"
It does not free up a spot. You are not the first to ask this
The description of the system is that you have 9 crafts. you can level all of them to lv 20, then you can take 6 of those to lv 40, and from the 6 you can choose to take 3 to lvl60, and only 1 of the 3 to lvl 80.
So you will end up with a maximum(if you choose to level everything) of 3 lvl 20 crafts, 3 lvl 40 crafts, 2 lvl 60 crafts and 1 lvl 80
Quoted