For poker site that has preferred seating like pokerstars,ACR,etc. you need to set the preferred seating for both poker site and DH2 the same and the HUD should automatically align with the right player.
As for X-poker, did you have any other table open? Close all poker table (including tables of different poker site). Open only one table, then reposition and save position. If it still does not work, send us a message though DH2’s headset/support icon with log attached so we can check this for you.