Portlet and ids

It seems that porlets displayed in a page (window) are identified
by an id. This id is equals to

contextPath + '.' + portletName

(from PortletWindowConfig.createPortletId source code)

This explains why 2 portlets in the same page
with the same name (therefore the same id) are conflicting.


Click on 'edit button' on the first portlet, make both portlets on the edit 
mode.

Is there any way to have many instance of the same portlet on the same page
without any conflits.

Thanks