Guild Wars 2

I’ve started a second warrior. Under the hero skills tab, weapon skills section it shows the weapon skills you’ve acquired by using weapons wieldable by the warrior.

Under axe skills, on the off hand is dual strike listed first and then whirling axe is listed twice (one above the other). I am unable to get both whirling axes highlighted to indicate that I’ve mastered the skill. Only the lower one is highlighted.

I’ve tried various combinations of weapons without success:
axe+axe
other 1h weapon + axe
nothing + axe
axe + nothing

What do I have to do to get the upper whirling axe highlighted? Or is it a glitch?

My first warrior has both whirling axes highlighted – not sure how since it happened near game launch when I wasn’t paying a lot of attention.

its for pvp