See this picture (Google Drive) for a better understanding of the problem.
https://drive.google.com/file/d/0B5OTDe4w53YyQl9FVnRITnVMbDA/view?usp=sharing
When you are about to select download quality - that screen is full of weird bugs - gets comfusing to use
as one cannot trust most of the values, simply because they're "all" inncorrect... just see on the picture example.