Minor Power Token = Major Power Token? Bug?

I think I have found a bug. I just made it to lvl 15 with my party and now they finaly got their first Major Power Token. Now the problem is whenever I equip a class skill that used a Minor Power Token before, it automatically changes to a Major Power Token. Even the description clearly says it only requires a Minor Power Token, but it still consumes a Major Power Token. This happens with all skills (wizard, warrior and priest). Here are 2 Screenshots:

Before equipping the skill:
http://www2.pic-upload.de/img/29112599/2015-12-13_00001.jpg

After equipping the skill:
http://www2.pic-upload.de/img/29112600/2015-12-13_00002.jpg

Anyone experience the same problem?

 

This isn't quite a bug. Yellow tokens are stronger than blue tokens, and so can be used instead of them. Although the skill only required a blue token, you didn't have any left, and so a (stronger) yellow token was used up instead.

 

Ah, so I didnt get another Token, but the Major Power Token replaced a Minor Power Token?

 

Yep.

 

There still is a really old bug involving power tokens, when a Major power token takes the role of a Minor power token, it doesn't automatically switch back when minor tokens become available.