Two plants "División El Teniente de Codelco" and "Minera Valle Central" processed the same ore and extracted 70000-75000 tons of copper more than theoretically possible?

From the series of publications 
"So they create a fairy tales for the investor" - 
"They draw up the necessary documents
and begin to search for the simpleton..."

CODELCO "EL TENIENTE" (Chile)

Owners:  Codelco (Chile)

Let's count together:

They process  137000 tons per day.
If the plant works 365 days a year, 24 hours a day, the plant’s productivity will be 50 million tons per year.

The copper content in the ore is 0.86 (0.56) %.
The maximum amount of copper (theoretically possible) that they can extract from their ore is 430000 (280000) tons per year of copper.

CODELCO "EL TENIENTE" has already received 465040 tons of copper in 2018 and 459744 tons of copper in 2019.
How is this possible?
How can one extract and sell something that does not exist in principle?

Copper shortage should be 30000-35000 tons per year (180000-185000).

How can copper recovery at a plant CODELCO "EL TENIENTE" (Chile) be 108 (166) %? (The recovery cannot be more than 100%!)

It is theoretically impossible to produce such an amount of copper at the plant plant CODELCO "EL TENIENTE" (Chile). How did they produce more copper what is contained in the ore?

The most interesting thing is that the plant "Minera Valle Central", which process the tailings of the plant "El Teniente", did not go bankrupt and produced another 40000 tons of copper from tails. How did the MVC receive so much copper if Codelco extracted everything and tails do not contain copper?

IMHO: Two plants "División El Teniente de Codelco" and "Minera Valle Central" processed the same ore and extracted 70000-75000 tons of copper more than theoretically possible? (Recovery 118 %?)

Ph.D. Natalia Petrovskaya 

  References

1. https://www.mch.cl/wp-content/uploads/sites/12/2020/01/MCH463_digital-1.pdf
2. http://www.portalminero.com/display/NOT/2018/12/07/Minera+Valle+Central+inaugura+nueva+planta+para+el+procesamiento+de+relaves+finos
3. https://www.codelco.com/produccion-2018/prontus_codelco/2018-05-16/130208.html
4.  https://www.codelco.com/nuevo-nivel-mina-el-teniente/prontus_codelco/2011-07-06/130724.html
5.  Planta de molibdeno de El Teniente fija meta de un 89% de recuperación
6.  https://www.mch.cl/2018/02/19/planta-molibdeno-teniente-fija-meta-89-recuperacion/