Welcome, @Arturo_Martinez1,
I’ve moved your post because Asana would likely would not classify this as a bug, and so that you can vote for that at the top of this thread.
The way I read the question–“exporting to excel”–I assume you’re asking about CSV export, but CSV export only offer the total actual time for the task, because CSV doesn’t easily support multidimensional/hierarchical output (table of actual time makeup within each task).
But maybe this addresses your need:
Thanks,
Larry