Hi,
Was your restore successful?
It counts data protection from backup time.
To be absolutely sure that data is under protection you should use option 'permanent' or 'until'.
Importing tapes is usually time consuming. In your case it is LTO5, and 14hrs for importion is normal by my experience.
Regards to "You have choosen an interval which doesnt include all the sessions needed to compose a full restore chain" - I think that it requires a previous full or incremental backup for which protection is also expired.