Nice FDC from Chile

A nice FDC from Chile.

This stamp is related to "The University of Tokyo Atacama Observatory Project".

This is a real posted cover.

My friend in Chile posted this cover at 26.July.2011.

I received this cover at 2.Aug.2011.

The date of postmark is 7.July.2010.

This is very interesting.

Is it normal in Chile?

Thanks friend!