CPS drops people from the unemployment column if they've been looking over 6 months. That's the methodology.
Since you appear to be misleading folks into thinking that somehow the CPS and individuals who participate in these monthly surveys are having an open dialogue where in order for a person unemployed and still looking for work could not possibly be counted as anything but unemployed, allow the BLS to clarify:
http://www.bls.gov/cps/cps_htgm.htm#where
If you've been looking for 6 months and you still haven't found a job, you're not unemployed anymore, even though you actually are. Government statistics, so incredibly useful.