Anomalous player ID in console

So after the wipe a few people joined the server that I host, nothing out of the ordinary.
But then I noticed that “players” indicates 5 players out of 50 online, but only 4 players are visible in the player list.
Additionally, one player (“snoopy”) displays an additional steam ID under the “owner” column.

http://s21.postimg.org/adir7h2fb/hax.jpg

Perhaps someone who knows a thing or two about how this enigmatic console works could help shed some light on why this is?

Thanks.

Without knowing the exact details about how it works, maybe Snoopy is a family share since there’s an owner listed.

He claims that is not the case

That shows the owner of the family share, are you the 5th player ?

thanks guys, I understand now.