Character is used by another person???

[SnakeEyes]

Hi, so I am having a bit of trouble understanding my problem. I go into a game and everything runs fine but every now and then i get a error that says "you have lost connection" i then try to rejoin the game i was in and it says "there is currently another player with the same profile name as you playing" what does that mean is there someone who has the same name as me??? This problem has just recently started. I think someone is trolling me.