I thought about it maybe you place the species choice right after the Era Choice, before you decide the Ability, I am also not sure If Kolos blooded can be Metalborn
I also noticed that you probably need to reposition the Hemalurgy/Inquisitor Placement in your chart, because:
a) Kandra can gain Allomancy/Feruchemy through Hemalurgy
b) Metalborn can gain more Abilitiess through Hemalurgy