User settings missing for one player

I imported a saved world that my son and I have been playing. He has it saved on his PC and he shares it over the LAN. I decided to re-task an old PC I have laying around to be a MineOS server. The server is up and running on Linux Mint. I finally got the map up and running and I logged in and low and behold it was working. Everything was there as I left it. Experience, inventory, everything… Woohoo…Until he tried to log in. He was able to log on but he was at the default spawn point with nothing. Just like he was when we first started. Also his skin was wrong. Any ideas???