I've seen this behaviour, but I am not confused.  As a matter of fact, it
is helpful in some circumstances since here it confirms that the old
address is not valid.  Of course a QUIET change can be issued, but that
also inhibits the notification from being sent to the NEW address, where
it would be useful to verify that the new address is correct.

/Pete

  At 11:12 09/03/2002 Tuesday, Nelson R. Pardee wrote:
 >A list owner pointed out that when an owner uses wa to change a subscription
 >because the address is invalid and wishes to notify the subscriber that the
 >problem has been fixed, it would be helpful to have an option whereby
 >notification is sent only to the new address. Listserv automatically sends
 >notification both to the old and new addresses, and since the old address is
 >invalid, it generates an error message back to the owner, which can be
 >confusing.