I cant change the currency type in Expansesheet lvl

In my expansheet i have a lot of currency fields, but their type are locked only for USD.
I made some tests creating 3 different currency fields in expansesheet lvl ( default currency type, cost currency type and revenue currency type) . But all 3 mantain USD currency type, even when i set the cost as PEN. 

Is this happening because my global currency type is USD , and in expensesheets, the currency fields only look for the global type?

Thank You