Is improving job market a problem for employee?

"The number of U.S. workers seeking first-time jobless compensation rose unexpectedly by 3,000 last week, according to a government report released on Thursday.The Labor Department said initial unemployment claims climbed to 324,000 in the week ended March 19 from an upwardly revised 321,000 the prior week. A Labor Department analyst said there were no special factors behind the increase in new claims. While they have fluctuated, new claims have held below the 350,000 watermark -- seen by economists as a sign of an improving job market for 10 straight weeks.
The U.S. central bank's Federal Open Market Committee on Tuesday raised interest rates a quarter point for the seventh straight time and said economic output was gaining solidly and that job markets were improving. "
So what do you think about inproving job market? And why it can cause an increasing in the US jobless?