Stream endpoint provides stream informations for playlists?

Ehm, right now I get this response from https://api.twitch.tv/kraken/streams/zueljin

{
	"stream": null,
	"_links": {
		"self": "https://api.twitch.tv/kraken/streams/zueljin",
		"channel": "https://api.twitch.tv/kraken/channels/zueljin"
	}
}

And he is currently broadcasting the playlist. And that was the case the whole last year. My bot prioritizes streams to host that have less viewers. With 1 to 3 people watching the playlist he would be always on top of my list and therefor would be hosted once a day. I would have noticed that and fixed it. So one of the two behaviours is not intended.