[KLUG Members] Win XP showing up as Master and Server in smbclient command

[bill]

I noticed two oddities on my network and wondered if they were related.

In a mixed Linux / MS network with a Samba server, I found a Win XP box
listed also as server and something called a Master.

smbclient -L some_other_linux_samba_server_box

This command shows the info about the other Linux box (samba server) but
also unexpectedly shows the XP box under the Server category (along with
the samba server) and under Master (all by itself).

What do those two things (Server and Master) mean?

Why is the XP box showing up in the Samba server's info?

The other unexpected thing is at the same time, other Win computers no
longer show up in the Network Neighborhood of each other's Win boxes.  I
can find them manually, but why do they stop showing up in Network
Neighborhood?

Are these two issues related?

kind regards,

bill