I work in the legal industry and a lot of mark-down happens between the lawyer's work hours and the final bill at many different stages. Lawyers track every se

I work in the legal industry and a lot of mark-down happens between the lawyer's work hours and the final bill at many different stages. Lawyers track every second but they don't bill for every second. In fact, a lawyer might mark-down hours for the very same reason as the OP -- something has taken longer than it should.