2012 and 2013 are instrumentals
of 'Barefoot Ballad' and 'There's Gold In The Mountains' and were actually used in the movie.
Although unlikely, it is unsure if Elvis did a vocal overdub to one
of these on October
10 (2018). More likely the production number 2018 was reserved for but not used for a vocal overdub, as sometimes happened with movie company recording sessions.
Thanks to Kevan Budd and Erik Rasmussen.