Things have never been better for the American worker.

Almost any way you slice it, things are getting tighter in the U.S. labor market, which should translate to faster pay gains for American workers in 2017.
Employers in the U.S. stepped up hiring in November, adding 178,000 workers to payrolls, and the jobless rate unexpectedly tumbled 0.3 percentage point to a nine-year low of 4.6 percent, a Labor Department report showed Friday. The number of involuntary part-time workers dropped to an eight-year low and the so-called underemployment rate was the smallest since April 2008.
“We’re at full employment,” said Michael Gapen, chief U.S. economist at Barclays Plc in New York. “The slack is gone and we’re now creating scarcity.” This is “consistent with modestly firming wage growth.”

That sounds awesome.
But wait a sec. Why did this happen?

Average hourly earnings unexpectedly fell 0.1 percent in November, pushing the year-over-year growth rate down to 2.5 percent, though the disappointing data on worker pay may be a timing issue.

Since when do wages fall in a "tight labor market"?
And why did 446,000 Americans drop out of the labor force in November?

And finally, if the job market is so tight and the number of involuntary part-time workers at an eight-year low, why are full-time jobs still vanishing while people holding multiple part-time jobs still going up?

Something doesn't add up?