You are apparently using the USB transfer mode of MTP or Auto (which defaults to MTP). Go to Settings > System Settings > USB Mode and switch it to MSC. Now format the player (also in Settings > System Settings) and the card, which will erase everything you put on it and then re-transfer your content in the new connection mode. You shouldn’t have any more re-naming problems.
And yes, the smut filter here will bleep out your first name. Nothing you can do about that. Real names aren’t important here anyway, everyone is known by the screen name they select. 
