I cancelled the lot, let Abrosia run a little and when I logged back in manually to put it back up on the TP... it was gone.
Are you sure you aren't just extremely unlucky? You said you cancelled the lot, which I'm assuming means you left the stamp in your inventory while Abrosia was running. It is completely possible a random event caused the item to disappear and it did not show up on the log (which happens to me occasionally).