Maybe, maybe not. It could just be random chance.
Apparently most hens produce a fairly even mix if you hatch enough chicks.
But small numbers tend to give you odd results.
--one chick is either male or female. 100% one gender, or 100% the other.
--with two chicks, about half the time you get a mixed-gender pair, but the other half the time you get two of one gender.
--with three chicks, you get all one gender about 1/4 of the time.
--with four chicks, you get all one gender about 1/8 of the time.
(it keeps going down from there, but still happens sometimes.)