In "My inventory" when you click the edit section, it only shows the linked titles. I think there should be option for Listings too, it should show the listings which are linked with this SKU and provide information like :
and should give the user option to update title & price in listing directly from there. Because it will help user manage multiple listings of the same product in one screen. It will also help identifying duplicate listings, difference in title and prices and ability to compare prices and performance of the different listing of same product.