Player spawned in as another player

[illusions]

Our server crashed, gameservers went down, on it coming back up and being able to re-log in
one of the players came back in someone elses player, were he logged out, all his items, points on a map,
skills, its as if he logged in as me..  He is still attached to his land claim box he put down in his base however all of his character

is not to be found ..

 

Anyone have any idea? or seen this happen??