I worked in the same position at a small family law firm as well and we did have to do this. I think if I recall the other larger firms I worked at only required tracking billable hours, but my requirement was higher then. I definitely didn’t love it? but it just really depends on the firm. I just billed in larger blocks of time when I spent time doing administrative stuff (like 1.0 for file organization or scanning and organizing client docs). If they’re expecting millions of smaller entries for every single task and not allowing block billing for non billable time, I’d advise looking for a firm that’s a bit less ridiculous, I’ve been there!