save to list dir and conditionally to $DEFAULT

I want all list mail to be saved to the appropriate list folder
and if they match a pattern in a file, also save to $DEFAULT.
This is what I am trying, multiple stanzas like these;


:0:
* ^x-mailing-list:([^ ]*\/\<.*)
{
:0c
$LISTDIR/`echo $MATCH|sed -e 's/[@\.>].*//g' -e 's/.*[ <]//' -e
's/.*://'`
:0
* ? egrep -if  /home/eric/serialised_subjects
$DEFAULT
}

:0:
* ^x-list:([^ ]*\/\<.*)
{
:0c
$LISTDIR/`echo $MATCH|sed -e 's/[@\.>].*//g' -e 's/.*[ <]//' -e
's/.*://'`
:0
* ? egrep -if  /home/eric/serialised_subjects
$DEFAULT
}

The behaviour without the `c' in :0c is that the mail is only saved in
the list dir. And with the `c' in :0c, the mail is saved 
MULTIPLE times in list dirs (as it matches more than one list
regex condition) and one in the $DEFAULT.

What would be the correct implementation?

-- 
Best regards,
Eric Smith
Mobile: 00 31 6 455 09313 - Tel Wageningen: +31 317 728888