Can you please explain exactly why some things might not understandable so I can help you better??
I barely remember the other instances. In general, the changes I notice are with the breadcrumb menu and the pages each link in the breadcrumb goes to. Sometimes there are pages in that breadcrumb that I cannot edit – there is no admin edit feature available, there are pages I cannot add via the WP Edit Menu – they do not show up as pages in that Edit Menu section.