This is from member chopsitcks - how to delete your scheduled listings if they are stuck. By following these steps below it will not only help you but also should aid the fixing of the sheduled listings bug!!
If you want to cancel your "stuck" scheduled postings here is how:
1. Go to the saved listings page and open the listing that you scheduled (it will have an asterisk next to it).
2. Go to the bottom of the page and select "Save as new". You will end up with two copies of the scheduled listing saved.
3. Go back to the saved listings page and delete the listing that was scheduled (the one with the asterisk next to it).
4. Now go to the scheduled listings page and delete the scheduled listing. You will get an error message but the listing will be removed from the queue.
This will help to clear out the queue and you should not have to worry about those "stuck" listings posting.
This might be better than "re-posting" scheduled listings that are still stuck in the queue because you wont have to worry about those listings posting twice. Once they are removed from the queue you should just post manually.
Clearing out the scheduled listings queue may also help tech support to refresh their database more quickly and resolve the problem.