Your description suggests some form of document corruption. Corrupt documents can often be 'repaired' by inserting a new, empty, paragraph at the very end, copying everything except that new paragraph to a new document based on the same template, closing the old document and saving the new one over it.

PS: Please don't post the same question in multiple places. I have deleted your other thread.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]