Just guessing, though I have from time to time had a document that would not play by the rules.
I assume from what you say this only happens with one particular "doc".
If so and particularly if it is not too complex, try saving it as RTF instead of DOC, use a new name for it too.
Better still save it as text only, but that may give you too much work reformatting to the original style afterwards.
Stronger medicine would be to copy and paste the narrative to a new document and then save it to a new name.
If this works don't forget to delete the original.