Odd Log Data and GUIDs

[Jeff Abbott]

Hello folks,

I'm writing a stats processing engine for CoD (I don't care for
mohstats and it seems to be the only functional one out there) and I
was noticing something interesting in my test log:

126:38 J;405817;5;!nferno
126:38 J;405817;4;^7pow^9e^7rsor^3.
128:07 say;405817;4;powersor.;b
128:12 A;405817;4;allies;^7pow^9e^7rsor^3.;bomb_plant
128:36 D;405817;5;axis;!nferno;405817;4;allies;^7pow^9e^7rsor^3.;bar_mp;56;MOD_RIFLE_BULLET;torso_lower
128:36 K;405817;5;axis;!nferno;405817;4;allies;^7pow^9e^7rsor^3.;bar_mp;56;MOD_RIFLE_BULLET;torso_lower
128:41 W;allies;405817;^7pow^9e^7rsor^3.
128:41 L;axis;405817;!nferno

What I'm seeing here is this guy appears to be joining two clients
with the same GUID.  I was under the impression that GUIDs were unique
and were based on your CD key.  Am I mistaken?  It's very clearly two
separate clients as not only does he shoot "himself" but he is also on
both the winning and losing teams.  Any thoughts as to what's going
on?

Thanks,
Jeff