When scrolling over some parts of the HUD you should see a graph popup with the player name it belongs to. You can then left click and drag the HUD to align that HUD with the correct player. You can use a right click and drag to align individual parts of the HUD to your desired positions. Make sure to click on the icon at the top of the table and Save the HUD Position there.
Reading through the thread below might help you a little bit more.