If ever you need to edit the details that you see in the Manage Listings page, you can edit the Master Listing details. To find these, locate the cog under the title of your listing, like so:
That will take you to this page:
Changing details on this page will not make changes to existing marketplace listings. However, it will be what Listing Mirror uses to create new listings from this point on.
Please contact us if you have any questions about master listings.