More info:

As of right now, a search for domainnameb.com in google actually brings up both websites. the domaina and domainb, so it looks like to me, the redirect hasnt completely gone away yet. I think that will have to happen first to get any rankings to the new url since Google still thinks they are related.

If I search for the title of a page in quotation marks, just the old site comes up. (Even though the title/content has since changed on the old site.)