The nice thing about SellerChamp manifest's is that you can scan any item into a manifest regardless of whether or not that item is already in that selling channel.

When you submit the manifest, we'll automatically increase the quantity of the item(s) that are already in that selling channel and create listing for the new ones.

Listed - Items that are listed in a marketplace

Active - Pretty much the same as listed, so when an item is listed we change the status of the item from not Listed to Active