It may or may not be a  problem, depending on the keyword. By definition,
if a keyword appears N times in the header, the N values are concatenated
to form the final value. This means  that if you have 10 Owner= keywords,
no  problem, it  will use  the 10  set  of owners.  If you  have 2  File=
keyword, it will probably get an  "invalid" value (ie neither YES nor NO)
and will  assume the default,  which I think is  YES. In other  words, it
does not work for what you want to do.
 
  Eric