Unemployment rate plunges to 9% in January, but only 36,000 jobs added

"This jobs report is like looking in a funhouse mirror," said Stuart Hoffman, chief economist at PNC Financial Services Group. "It's hard to be sure what's really going on."
The two contradictory numbers are based on separate surveys - of employers for the job growth data and households for the unemployment rate. Given the divergence, even White House economists, who'd be expected to rejoice at the steep drop in unemployment, advocated caution in interpreting the numbers.
"You never want to read too much into a single month's data," Austan Goolsbee, chairman of the Council of Economic Advisers, said in an interview. "It's certainly a good sign that the unemployment rate is coming down, but there will still likely be continued fluctuations going forward."

　数字にまどわされるなということらしいです。