Dont sent meeting to this attend issue

I use OL2003 on Exchange Server 2003.

When I set up a meeting request and invite delegates you can (theoretically)
go back into the meeting request and add additional delegates or just send to
some of the delegates listed.

What I have done is marked the delegates I do not want to email as "Dont
send meeting to this attendee" which then crosses them out. I then send an
update and I am then prompted with options

* Send updates only to added or deleted attendees (default)
* Send updates to all attendees

So I go with the default which sends to the added person but the person I
requested not to sent meeting to has now received a cancellation.

If I try option 2 the same happens.

Are there bugs in the sending updates to specific attendees and do you know
of any work arounds or am I simply using this feature incorrectly? As i have
cancelled to many attendees in the past with this technique!!!

Any advice welcome!