This is  not about lists  or list owner control.  This is about  what the
files  are  called. I  would  need  more  information to  determine  what
happened exactly. But, however it happened, LISTSERV determined that your
subscribers were  AFDed to the  other people's files. It  also determined
that  their files  belonged to  your filelist.  When you  do a  PUT of  a
FILELIST, LISTSERV looks at all the files registered in the corresponding
FILEID that are still  on disk and if it doesn't  find them it complains.
It does NOT look  for other files that might have the  same name in other
filelists. So what probably happened is that the files were registered in
their filelist but in your FILEID, in which case it would be a bug.
 
  Eric