My safari's reading list is "one shot", in the sense that if I open a URL it gets deleted, so I can just read it once. But some articles are long and I read them in 3-4 times. How do I change this behavior? I'd like that reading list items could be removed just manually.
They're not being deleted, they're just read and you're hiding read items. Show unread items in reading list by clicking the Show Unread button above the list.