You can relist from closed listings, it will relist the auction as it ended on ebay (handy if you made a change after you listed it and what that change to stay)
Saved listings I am not sure if you can import them from Active listings, I think they are listings you made through Auctiva, but yes you can list from there (item will not be eligible for a relisting fee credit if relisted through saved listings as it needs to be associated with the completed listing. Items relisted through closed listings get the relisting fee credit if it applies)
If you often post the same or similar items It might be worth checking out the profiles. This lets you save features (ie gallery) and checkout (payment options and returns policy) seller details will add details to your auctions about payment terms, about us, contact us etc.
I have it set up so I can do a repeat auction in about 4 clicks, photos, item description, price, format, everything.