Similar Products don´t get grouped on review Page When adding multiply quantities of the same product they don´t get grouped but splitted to each line on the overview checkout pane.

-Example-

Instead of: 


  Product: PLAYSTATION QTY 3


It shows:


  Product: PLAYSTATION QTY 1
  
  Product: PLAYSTATION QTY 1
  
  Product: PLAYSTATION QTY 1


I know this is a view, I tried to configure it to grouping, but with no change.
Even this module did not help:
https://www.drupal.org/project/views_aggregator

What can I do to have all similar products grouped and sum quantity?
You have to go to admin/structure/types/manage/YOUR_DISPLAY_TYPE/display, search for the product field / add_to_cart form
and set it to combine like items : enabled

That's it.