I've posted local listings regularly for about 6 months and had a couple of minor glitches, but recently two listing I've put on have completely disappeared.
I've reloaded one of them 3 times now and fingers crossed it'll stay put. I've emailed HQ but no update.
I notice that it's possible to delete someone else's listing... I do hope it's something technical instead.
Perhaps a listing should only be delete-able by the creator and MNHQ? Just a thought.