I forget what the time limit is -- 24-72 hours -- but until the limit is reached there should be a DELETE button visible on the bottom of each of the extra posts. You must go to each extra post and just push that button. Unfortunately it needs to be done individually on all of the extras. After the button is pushed, when the next window opens click SUBMIT. You do not need to type anything in the reason box to delete. After the time limit then only the webmaster can delete them.