OK, the articles match now, but I don't see the indicators for media queries I typically see in Dreamweaver. And if you're using the release version of Muse (not the prerelease version) you cannot build phone/tablet layouts AFAIK.
When I look into your folder of content, I see extra stuff and clues that lead to suspicions about your challenge.
There are a couple of files and folders I suspect you don't need in an article:
-The html folder is empty,
- There's a folder and css for phone that may be intended for phone but a script that re-directs a phone to this code might not be working in a DPS context,
- And I'd likely delete the muse_manifiest.xml file.
That second point is most suspicious to me.
Go to the link, you can join the prerelease. I don't know when they will release.