--- loncom/html/adm/helper/newslot.helper	2005/11/02 22:07:52	1.7
+++ loncom/html/adm/helper/newslot.helper	2005/11/02 22:14:53	1.8
@@ -229,7 +229,9 @@
 		my ($uname,$udomain)=split(/:/,$user);
 		push(@names,"$uname\@$udomain");
 	    }
-	    $slot{'proctor'}=join(',',@names);
+	    # make sure the usenrmaes are unique
+	    my %proctors = map { ($_,1) } @names;
+	    $slot{'proctor'}=join(',',sort(keys(%proctors)));
 	}
         my $cname = $env{'course.'.$env{'request.course.id'}.'.num'};
         my $cdom  = $env{'course.'.$env{'request.course.id'}.'.domain'};