When you try to print a file, Word takes a small copy of the file to its hidden folders and once printed, it deletes it. Also, when the document is opened, a tmp of the same doc is created to carry over the delta.
In short, it boils down to two things:
1. Either the user privileges,. ie. from where is the document being printed and which user and to where. In the process, is the file being changed anywhere else by other user??
And of course, this thread has to be taken up with the MS forum. 