You may want to try posting this on the selling board, along with a description of exactly what you are experiencing. Other sellers there can respond if they are encountering similar issues or if there is a workaround.
Only a handful of users can respond on the Mentor board.
If changes to your description are not being saved when you try to list, try clicking on a different field other than the description before hitting the "list" button. In the past, others have encountered problems where changes made to the last field were not being entered correctly if the cursor was still active in that field when listing. By clicking in another unchanged field immediately before listing the item, the description field could be updated in that particular case.
