I am pointing several domains to one URL, a URL which happens to include a subdomain. ALL of the domains are using 301 redirects to point to this new address.

One of the older domains (which used to be a site) is a 'property' in Webmaster Tools, as is the new site (the one with the subdomain.)

When registering a 'Change of Address' for the old site with WebmasterTools, it suggests the following method -

• Set up your content on your new domain. (done)
• Redirect content from your old site using 301 redirects. (done)
• Add and verify your new site to Webmaster Tools. (done)

Then, directly below that, to proceed, it says

Tell us the URL of your new domain: Your account doesn't contain any sites we can use for a change of address. Add and verify the new site, then try again.

I have already submitted and verified the new site. The only reason I can fathom I am getting this error is because the new site includes a subdomain.

Although I don't foresee getting punished for this, as I am correctly 301 redirecting traffic anyway, I'm curious as to why the Change of Address submission isn't working appropriately for me. Has anyone else had experience with this?