As far as I can remember, this has been the behavior of Word: if you print a document it sets the "file changed" flag. After some research, this is because some Field Codes are reset due to repagination.I navigated to Tools, Options, View, and selected the "Field codes" box, and for "Field shading" I selected "Always". As far as I can tell, there are no fields in the document. Given the nature of these documents, I wouldn't expect any either.
Here are a couple of helpful pages demonstrating macros to do what you want: http://support.microsoft.com/kb/211773/en-us Print all open documentshttp://support.microsoft.com/kb/209810/en-us Print all documents in a folder