JST gender is determined by the red plastic connector housing and not the actual pins. The female JST connector has metal pins inside it, however, since its plastic case fits over and envelopes the male JST connector it is considered the female of the species. Unfortunately this has created some confusion. If you go by the pins, the genders seem reversed than the actual product title. But if you go by the red plastic housing it will make sense what the manufacturer intended.
WARNING: This connector is officially rated for 3-Amp applications. Using this connector in applications greater than 3-Amps may cause the connector to melt and short. BP Hobbies assumes no responsibility for any damage as a result of a JST connector melting.