Im having this odd problem with the raidframes (and party using them for both). When I join a raid sometimes or someone new joins they may create a double of the previous player like this, mostly a player clones me but it happens to other players to. It goes away and the right name appear if I reload or just take up fullscreen map ...
Btw hovering arp with 35k with is a mage in this case as you see on the tt and not a double me :P
EDIT: It came with the patch, didnt happen before