You forgot the word "new" in your second search, which is why you get different ...

sounddust on May 20, 2010 | parent | context | favorite | on: M.I.A.'s album "/\/\/\Y/\" is ungoogleable

You forgot the word "new" in your second search, which is why you get different results. Those characters are being entirely ignored. You get the exact same results by searching for "Y new album"