This is the shoulder pattern piece
these are the armholes (there's also the back piece that works into the armhole. but there's no markings on that!)
And then problem two.
the longer piece is the left front side facing piece.
Above that is the back facing.
Im absolutely puzzled as to which way the front facing piece attaches onto the back facing.
Very angled, to the back facing, or slight angled to the back facing.