Outlook 2002 Appointment anomaly

I have an interesting issue that has arisen at the office here that is something that I need some input on.

Client Platform: Windows 2000 Pro.
App: Outlook XP as installed with Office XP Suite - SP3.
Server: Exchange 2000 on Windows 2000 Advanced Server.

Here's the issue:

1)  User A makes a new Meeting Request and invites User B.
2)  User B accepts the request.

The meeting shows correctly in both user's Calendars.

3)  User B decides to opent the Meeting Request and add some comments to the comment pane at the bottom of the window.
4)  User B then closes the Meeting Request and is prompted to save changes - he does so.

At this point, User A has the original Meeting Request in his Calendar (unaltered) and User B has his own, editted copy in his Calendar.

5)  User A decides to change the Meeting to a new time (or date - it doesn't matter) and a second Updated: Meeting Request goes out to User B.
6)  User B accepts the request for the Updated time.

At this point User B goes back into his Calendar to add more text to the comment pane and discovers that everything he typed previously is gone.

Now, my question is this:  Why didn't Outlook preserve his text when moving the meeting?  Why didn't he get prompted if he was going to lose it?  Is this a bug or a procedural issue?

Any insight into this would be great - we've had a number of these issues come up and losing a page of typing is not a good thing.