I'm not home rn so I can't test it, but I'm quite sure that netflix says something like "we don't have X, these titles are similar" or smth like that. Maybe I just have an old version in my TV idk.
I've seen both. Sometimes it says it doesn't have it, other times it just displays results like it does have it even though it doesn't. You might be onto something, it's probably the difference between the web interface and app interface (on various devices).