I don't understand why Admins cannot give @iHazBryn the in-game title when they can give it to heylookitskyle?
To my understanding, titles were implemented in the beginning of the map. Whoever got whatever killstreak title then, they kept it. Then titles were removed due to players abusing /kill. A little bit later, they were implemented. I think you got your 100 killstreak during the time when killstreak titles were removed.
I have heard of other bugs such as this. P2thplx or something went on an 87 killstreak, and got no [Assassin] title.@Kainzo
Based on the screenshot, I think it's legit - which also means this will be a tough bug to track down.