synced files are linked to originals?

[lewis butler]

I'm very confused.  I ran this command:

/usr/local/bin/rsync -aCHh --stats --delete-after --delete-excluded \
     --exclude="/backup/" --exclude-from=/var/.rexcludes \
    / /backup/daily.0

then I ran these commands

  mail ~ $ ls -ls etc/postfix/main.cf
28 -rw-r--r--  1 root  wheel  28322 Jul 27 16:31 /etc/postfix/main.cf
  mail ~ $ ls -ls /backup/daily.0/etc/postfix/main.cf
28 -rw-r--r--  1 root  wheel  28322 Jul 27 16:31 /backup/daily.0/etc/ 
postfix/main.cf
  mail ~ $ echo "#test" >> /etc/postfix/main.cf
  mail ~ $ ls -ls /etc/postfix/main.cf
28 -rw-r--r--  1 root  wheel  28328 Jul 28 03:39 /etc/postfix/main.cf
  mail ~ $ ls -ls /backup/daily.0/etc/postfix/main.cf
28 -rw-r--r--  1 root  wheel  28328 Jul 28 03:39 /backup/daily.0/etc/ 
postfix/main.cf


So, yes, when I make a change to the file in /etc/ it gets changed in  
the backup.  /backup is a different file system from /.  The files do  
not report as being linked.

/var/.rexcludes contains:

SPAM/
*.core
tmp/*
*.mov
*.avi
*.mp3
buos/

(buos is an ftp account that is not backed up as it's files are  
transitory and change frequently)

mail ~ $ rsync --version
rsync  version 2.6.9  protocol version 29
Copyright (C) 1996-2006 by Andrew Tridgell, Wayne Davison, and others.
<http://rsync.samba.org/>
Capabilities: 64-bit files, socketpairs, hard links, symlinks,  
batchfiles,
               inplace, IPv6, file flags, 32-bit system inums, 64-bit  
internal inums

System is FreeBSD 6.2-RELEASE #0

Something stupid, I presume?