ok thanks for your reply!
JC

@stefani I havent read thru this thread but scroll up and read olivier's reply

when you create a top category set the params there

then create the sub cat and tell it to inherit from the top

when you create a sub sub tell it to inherit from the top also and it should work.

this may not fit all needs and a deeper level may be needed to take care of it.

change line (69-73) $inheritFrom = $form->getValue('inheritFrom'); to $inheritFrom = $values->inheritFrom; in administrator/components/com_k2/views/category/view.html.php

its work for me!!