This is the story:
I have 2 PC at home, one Registered and one didn't. When my two PC were playing at a same room, sometime the two play will stick together and one of them will become undead. After the other one died, he will appear beside the the undead one.

Is there anyway to fix it?? I don't want people keep saying i am hack.....Thanks

Im not sure i understand, you have two of the same players in a server, and the two will stick together and one will die? and he will appear again? Well, this has happened to me before, but not consistantly, if i join a server and i cant seem to join, than i leave theres "Messiah.Syn`" which is the first time i tried to join, and the second time i join it says "Messiah.Syn`(2)" and sometimes it follows me.