“Sort by difficulty level” on my books doesn’t seem to be entirely in ascending order:
マリア様がみてる 1 here is L27 but mixed in with a bunch of L30s. (This may be because I just graded it so its grading changed not long before this – does the grade used in sorting lag behind the grade displayed?) Also I expected the L30?? to sort together rather than scattered through the L30s.
Is there a way to say “show only my books between levels X and Y”? The filter dialog on the “my books” search doesn’t have all the options the main search does, and the main search lets you exclude books that are in your personal library, but there’s no option to exclude books that aren’t in your library. (Use case: somebody asked for recommendations at about a certain level so I wanted to see what I’d read that matched that.)