Agriculture and/or food service majors, dark chocolate question!

[emrtmakesshiteup]

Just how many tons of dark chocolate does Ghiradelli and, other manufacturers process at one time and why is it done like that? For six months to a year their 86% cacao has been dated 9/30/19. This at any grocery store in the US (at least four states that I'm aware of!). Thank you!