Someone is doing something strange there, or it could be an anomaly.
Bill, check the backlinks again. There are two backlinks pointed to that user profile page and one is from a Russian site and uses Cake Central for the anchor text. That, however, should not cause it to rank higher than CakeCentral.com unless someone figured out a nifty new trick. I don't see any evidence of a redirect using the info query, but the Russian site might be a clue.
I've seen a few Google search anomalies lately. I have a client who has a secondary one page minisite with only one image and about 20 words on the page, plus zero backlinks, yet the page ranks in the top 10 in Google for a fairly competitive local search phrase that does not appear on the page. A junior designer set up the page a few months ago and they never built the site. The guy wanted me to reproduce it on ten more minisites so that he could commandeer all the top Google search results.
"Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote." -- Benjamin Franklin