it is correct as it is now it's your work alone that made the article is eligible for dyk not mattias so only you should be credited if anyone makes significant improvements to the article before it hits the main page they can be credited aswell the nomination template also says created expanded by struway so it's not a big deal recently an article created by me edvard skagestad was featured in the dyk but that was because of the work of so only he got the credit from it