That is because you changed the manamultiplier between promotions (and also the skills multipliers, right now your shielding skill is probably bugged aswell), if you do that, they will bug and keep raising forever like if you had 99999 multiplier. At least that happened to me like several months ago on TFS 0.3.2 when I did what you did, so Ive never done it again and never had issues again and I have 36 vocIDs on my new project, all working fine.
You must put the skills/mana multipliers the same as the "promotion 0" voc (non-promoted), just like you did with the first promotion of the knight (vocID 8), it has the same skill/mana mults of the vocID 4 so it works fine, but then you changed it to 1.0 on vocId 12 and there it bugged.
Thats just the solution I chose, but maybe there's something else to do that I dont know of!
Good luck :thumbup: