[exim] unseen behavior

Hi list,
i've made a configuration using hubbed hosts to have a backup of the
incomming mails for certain domains. here it is:

hubbed_hosts_bkp:
condition = ${if eq {$domain}{${lookup mysql {XBKP_DOMAINS}}}}
debug_print = "R: hubbed_hosts_bkp for $domain"
driver = manualroute
domains = ${lookup mysql {MYSQL_QBCC_HUBBED_BCC_DOMAINS}}
same_domain_copy_routing = yes
route_data = ${lookup mysql {MYSQL_QBCC_HUBBED_BCC}}
transport = remote_smtp
unseen

hubbed_hosts:
debug_print = "R: hubbed_hosts for $domain"
driver = manualroute
domains = ${lookup mysql {MYSQL_Q_HUBBED_DOMAINS}}
same_domain_copy_routing = yes
route_data = ${lookup mysql {MYSQL_Q_HUBBED_HOST}}
transport = remote_smtp

It all works fine except one thing:
if sending an email to one@??? with a cc to two@???
(to note that domain1.com is the same domain) the first router,
hubbed_hosts_bkp, passes the mail to the both destinations, while the
seccond,
hubbed_host, only to the two@??? (the cc address). strage
enough is if it is to be as destinations one@??? and as cc two@???
(to note that domain1.com and domain2.com are diffrent) everything
works fine.

to be more clear in my explanation i'll give you the log:
2009-08-25 12:00:05 1Mfsov-0004la-Lj <= marian@???
H=mailserver01.avanzati.it [212.112.67.71] P=esmtp S=1456 id=CF025A93-0098-4190-981A-6C617275DD52@???
2009-08-25 12:00:06 1Mfsov-0004la-Lj => two@??? R=hubbed_hosts
T=remote_smtp H=212.112.67.190 [212.112.67.190]
X=TLS1.0:RSA_AES_256_CBC_SHA1:32 DN="C=US,ST=N/A,O=Zimbra
Collaboration Suite,OU=Zimbra Collaboration Suite,CN=domain1.com"
2009-08-25 12:00:06 1Mfsov-0004la-Lj => one@???
R=hubbed_hosts_bkp T=remote_smtp H=212.112.67.191 [212.112.67.191]
X=TLS1.0:RSA_AES_256_CBC_SHA1:32 DN="C=US,ST=N/A,O=Zimbra
Collaboration Suite,OU=Zimbra Collaboration Suite,CN=domain1.com"
2009-08-25 12:00:06 1Mfsov-0004la-Lj -> two@???
R=hubbed_hosts_bkp T=remote_smtp H=212.112.67.191 [212.112.67.191]
X=TLS1.0:RSA_AES_256_CBC_SHA1:32 DN="C=US,ST=N/A,O=Zimbra
Collaboration Suite,OU=Zimbra Collaboration Suite,CN=domain1.com"
2009-08-25 12:00:06 1Mfsov-0004la-Lj Completed

Any idea on how to solve this? what i need is to have the mail passed
through the two routers to all destinations.