How are there more unemployed? The +165K is the net of additions and subtractions. From the BLS release:
The unemployment rate, at 7.5 percent, changed little in April but has declined by 0.4 percentage point since January. The number of unemployed persons, at 11.7 million, was also little changed over the month; however, unemployment has decreased by 673,000 since January.
Job participation rate didn’t change.