Could Yarndex have a mistake?

I got some Rowan Yorkshire tweed 4 ply on Ebay and i wanted to check something and i came across Yarndex. They have this yarn in DK weight category:

and the DK version of the same they listed as worsted:

Am i missing something? Is the yarn not what it’s said to be?:shrug:

They definitely aren’t 100% accurate from what I have found. In googling that yarn, every other site I saw says it is a fingering weight.

That’s exactly what i found about it either. Just wanted something light and yet warm and wintery. Oh, I can’t wait for it, coming all the way from UK, with free shipping!