(Seemingly) Wrong Optimal Rank for Will to Power II

[Umo]

Platform: PC
ISP: Movistar
Type of Internet Connection: ADSL
Internet Connection Speed: 10Mb/s
Date & Time: Sep. 3, 2011 17:01 GMT+2
Frequency: Always
Character Name: Umo Heima
Race: Highlander
World: Gysahl
Class/Skill Rank: Lancer/34
Physical Level: 50
Area and Coordinates: N/A
Party or Solo: Solo
NPC Name: N/A
Monster Name: N/A
In-Game Time: N/A

Optimal Rank for trait "Will to Power II": 50.
It seems odd for me since all its counterparts (Complete Control II, Driven by Faith II, Mind Over Matter II, Asceticism II, cannot check Muscle Memory II) are Optimal Rank: 40.
Feel free to close the thread if this is working as intended, though I must insist it's a bit strange for me...