I don't understand why you care about this (and I don't much care myself), but it's perfectly possible that Brooklyn's 25-75 spread, including part-time numbers, improved to 162-165 this year. The numbers cited in the blog post are from 2007. My guess is that, seeing the coming changes in the U.S. News methodology, Brooklyn took steps to improve its overall numbers. (This seems much more likely than your scenario -- that Brooklyn straight-out lied to US News and got away with it -- doesn't it?) It could have, for instance, increased the admissions criteria for or decreased the size of its part-time program.
Moreover, the part-time numbers may not have a huge impact on the overall median and 25-75 spread. Already in 2007, the part-time program made up only about 1/3 of the class. The bottom 75% of the part-time program may fill in the bottom 25% of the overall class, for all we know. For what it's worth (again, not much), in 2007, Brooklyn's PT+FT median LSAT was higher than the median LSAT of any school ranked below it. I haven't seen the full 2008 data, but there's no reason to believe this has changed.