Wind Dancer Spirit Buff Broken

I was going through and trying to assign various skills to either weapon set. I went into wind dancer and it appeared you can assign both the buff itself and the knockback effect to another weapon set. Well in the process I deselected BOTH weapons sets for the knockback effect and now the tab you use to see the knockback skill effect is simply gone, tab doesn't exist and I can't select anything to get it back. Just tested it in game and the knockback effect doesn't work any more at all, its like I've completely disabled it. Worst thing is, I recut a spirit gem (which are incredibly difficult to come by) and it did nothing, same tab missing and skill still doesn't go the knockback effect. WTH?