Are WoD nemesis titles supposed to be xfaction, or not?

Ashran brawl made me think of this again–In the past I got the “Slayer of Sin’dorei” title on an Alliance character which unlocked “Draenei Destroyer” on my Horde characters.

I wanted the Orcslayer title so I did the Manslayer quest on this character since there are more humans than orcs, but after completing it “Orcslayer” did not unlock for my Alliance characters the same way “Draenei Destroyer” did for my Horde after completing the belf quest on my Alliance character…

I’ve been swinging into Ashran to kill orcs on my Alliance main since then, but I’m curious if I need to do that, or not getting the title was a bug.

Is this normal or a bug? Why do I have the “Draenei Destroyer” title if its normal?