When setting the objective : killnpc if you put color nametag does not recognize it , this is because the Citizens recognize the name with color codes , but Citizens does not use & it uses § in .yml and the Mine chat dont recognice this. This gener the problem already mentioned before.
I would like to make a suggestion is that instead of putting the name of the NPC can put the ID , so the prblem easily be solved and I suppose there would be much to reprogram the plugin.
I leave some screenshots if I have not explained well.

http://i68.tinypic.com/fvkbus.png

http://i65.tinypic.com/2w3ajyx.png

Is there any way to fix it ?

Thanks for this awesome plugin.

I will probably make it ignore colors in name.