Yeah I know it's more negative than -1 on block and that other frame data is listed wrong, but Zatanna's standing 1 being 5 frames is right.
Yeah you can't. If you put Raven on record doing Singularity (demon stance), then crouching afterwords, you realize that 6 frame high moves will whiff on Raven, while Zatanna's standing 1 makes Raven block. Meaning her standing 1 is a frame faster.