The max.order age feature on poloniex is seem to be buggy. Hope there is work improvement in the next version (may be slower process after cancel order and place new order base on current history). maybe add option to increase or decrease amount if price go up or down.
That's not an error with the max order age per se. It is a more general issue of APIs not playing ball with us.
The new version contains improvements to how leonArdo handles this.
Thanks,
Jonathan