I realize this is an old thread, but I'm having the same issue as @Dave01. I have a number of domains pointing to the same Webflow site. Most of them have linked just fine, but for some reason I have a few domains that I'm unable to "link" to Webflow. I get the same messages (unlinked) no matter what I do, even though I'm repeating the exact same steps and informations in the DNS settings.
Here's an example of a domain that I'm not able to link (lynn-doiron.com):
And what I see in Webflow:
And what I see when I "expand" the Unlinked button:
And here are my DNS settings for one of my domains that is linked successfully in Webflow (as you can see, I'm using the exact same settings, and this one works...):
My settings are exactly how it says in the Webflow instructions, and they're the exact same for those of my domains that DO work. I'm baffled... any thoughts on what I'm doing wrong???