I noticed this when I already replied, 
weird I saw as a recent topic I couldn’t test your file but I see you arc tiles measurements exceed the tile constraint.
I based with the tile constraint for both arcs and lines and the logic that corners have priority and the middle absorbs the remains.
Of course in terms of material optimization rotation alignment for cuttings plays an important role.
Also this topic about bricks is awesome with @maje90 and @laurent_delrieu.