When will they fix the editing and deleting of threads? You can't edit or delete a thread. This makes it hard to update.
There's no retroactive changing of posts created before Nov 16, 2014, so if you created your ad before that you will not be able to edit it.
Then write a new post in that thread to reflect the changes you want to express. There's more than one way to skin a cat.
Its past the cutoff date for editing. More info here. http://mmb.maverick.to/threads/editing-deleting-classifieds.101930/