Dunkmaster Darius audio issues.

I got this skin because Darius is my favorite champion(before Draven of course) but the audio isn't fully working for me.

He makes his classic skins noises when he auto attacks and uses his W on an enemy(the laugh). He doesn't say penta dunk when I get a penta dunk(tested this a few times in bots, no penta dunk). And the worst one is he makes his classic skins sound when he ults.

Am I the only one getting these issues or are others experiencing similar things?