I get why it happens, but if I've thumbs upped nearly everything in the Petty catalog thumbs downed most stevie nicks it should figure it out.
I was asking a computer science similar questions, like, in netflix, if I like a stand up comedian, but didn't like his last special, should I give that a thumbs up or down.
Also, until recently, netflix couldn't understand that if I watched five minutes of a movie 9 months ago, that means I didn't like it....but it kept on suggesting that i finish it.