The tracked changes are visible when you open the document because the
setting "Make hidden markup visible when opening or saving" in Tools >
Options > Security tab is turned on (which it is by default).
You can turn off the setting. However, you risk distributing documents with
tracked changes without being aware of it. Therefore, it is safer to keep the
setting turned on.
From Word's online help:
"Make hidden markup visible when opening or saving": Displays all comments,
annotations, deletions, and other types of revisions. If you use the use the
Show menu on the Reviewing toolbar to hide some or all of your revisions, and
you select this option, your revisions will appear when you or another user
opens the file. This option does not affect text formatted as hidden.
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Regards
Lene Fredborg
DocTools - Denmark
www.thedoctools.com
Document automation - add-ins, macros and templates for Microsoft Word