This is one of the one of the more common errors on the Yahoo! front page — repeated words:
That error isn’t unique. There are lots of others on yahoo.com, including qualifying the adjective unique. I can’t find a single authority that says it’s correct to write about anything that’s very unique, more unique, or most unique since unique means one of a kind. Everybody does it, but you don’t have to. Avoid qualifying unique. There are loads of other words you could use instead, like unusual, rare, uncommon, and remarkable.