So, prettay muchas... I was on KitPvp, and I wanted the d kit since I lost my emerald kit. I got some iron armor from my ender chest, and I put it on. -ultimate derp- So, I kept trying to get kit "Diamond," and it wasn't working. Kept trying. Thought it was a bug, logged off. I came back, it wasn't working. I was about to report this on forums when all of a sudden, my brain worked! I had armor on, okay, I'm a noob, I get it xD