proposed new time issue

[Lynn]

we are running office 2007 on exchange 2003
I have one user who whenever he sends out a meeting invite and someone
proposes a new time and he accepts the new time it places both the invites on
the calendar and doesn't remove the original time. I asked him if he was
being prompted to remove the original time and he said no any ideas why this
might be happening and how to fix it?

Thanks
Lynn