Bug proffesion mining

I am at maximum level and the instructor will not let me level up, I have tried the instructor in Dalaran, Stormwind and Exodar but nothing, it does not let me learn the next level of mining. What I can do? I attach images to make it look better:

http://imgfz.com/i/tMuneSy.jpeg
http://imgfz.com/i/tMuneSy.jpeg

http://imgfz.com/i/cw0HK3E.jpeg
http://imgfz.com/i/cw0HK3E.jpeg


Thanks you for you attencion :D

Have you checked if you unticked "Available" ones?

Bro, i love you <3 HAHAHAHA i'm so ***** XD