Alpo,
Unless you change the default, when you use Insert>Date and Time to insert a
date in a Word document then you are inserting a "Date" field. A "Date'
field always displays the system date, or most likely today's date. You
need to change the "Date" field to a "CreateDate" field. Right click the
field and select toggle field codes. Change { Date } to { CreateDate }.
To insert a CreateDate in the future, click Insert>Date and Time and uncheck
"update automatically."