New MC ghost??

So it was just a normal day in single player minecraft 1.4.4. Just gett'n wood when suddenly i saw a enderman a very short one with neon green eyes.I said to my self a short enderman...in the DAY time?He then turned into a wither and beat me up.But that was like....a while ago I never saw him until a few days ago when I started up my bukkit server.I planned that my friend xXMOTIONPROXx would help me with it so i whitelisted only him and me.Then when I was building the spawn I saw him again.I pressed tab his name was Batternjay.Odd.He left one word on a sign when he left it said Pickle.PLEASE CONTACT ME FAST IF YOU SEE BATTERNJAY!!!!!