Procmail is over-matching my expression

Thanks for the help Ruud.  Now I'm back to trying to solve my original
problem.  That is, the following message is being falsely detected as
coming *from* me, when it is really *to* me:
  
  From someone-else
  To: <disposable(_dot_)address(_dot_)jgombos(_at_)spamgourmet(_dot_)com>
  
  This is a placeholder for a body.

Here is the (simplified) script that is screwing up:
  
  MAILDIR=./
  DEFAULT=$MAILDIR/not_from_self
  LOGFILE=$MAILDIR/results.log
  VERBOSE=1
  
  FROM_="(From[ ]|(Old-|X-)?(Resent-)?\
  (From|Reply-To|Sender):)(.*\<)?"
  
  SG_ACCOUNT = jgombos(_at_)spamgourmet(_dot_)com
  
  SG_ADDRESS = [^.]+[.][^.]+[.]$SG_ACCOUNT
   
  :0 :
  *$ ^${FROM_}${SG_ADDRESS}
  from_self

The log:

  procmail: [5836] Thu Feb 24 20:09:11 2005
  procmail: Assigning "FROM_=(From[ 
]|(Old-|X-)?(Resent-)?(From|Reply-To|Sender):)(.*\<)?"
  procmail: Assigning "SG_ACCOUNT=jgombos(_at_)spamgourmet(_dot_)com"
  procmail: Assigning 
"SG_ADDRESS=[^(_dot_)]+[(_dot_)][^(_dot_)]+[(_dot_)]jgombos(_at_)spamgourmet(_dot_)com"
  procmail: Match on "^(From[ 
]|(Old-|X-)?(Resent-)?(From|Reply-To|Sender):)(.*\<)?[^(_dot_)]+[(_dot_)][^(_dot_)]+[(_dot_)]jgombos(_at_)spamgourmet(_dot_)com"
  procmail: Locking "from_self.lock"
  procmail: Assigning "LASTFOLDER=from_self"
  procmail: Opening "from_self"
  procmail: Acquiring kernel-lock
  procmail: Unlocking "from_self.lock"
  From someone-else
    Folder: from_self                                                         
103

The conditional should not be matching, because From_ is followed by
"someone-else".  If I remove the [^.]+[.][^.]+[.] expression from
SG_ADDRESS, it works, but it should also work with that prefix.  

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