Female guppies are actually males..?

[ConfusedGuppy]

Hi!
I was sold a trio of guppies, specifically asking for two females and one male. The bag they came marked in was '2 f, 1 m'. The two 'females' are a good deal larger than the male.

I've had them for a few weeks now and recently noticed the females displaying at each other which was funny until I realized they'd try to jab each other with their 'fins'. Which suspiciously look like the male's.
Their fins also seemed to have grown. Namely the dorsal on the darker one is longer, and the tail fin on the lighter one is longer.

Are these actually just larger male guppies? What's going on?

I have two pictures below of the 'females' in question, that, while not the best resolution, I think give a pretty decent view of their suspicious fins.
The first picture shows the confirmed male as well (smaller)

Thank you for reading!

 

[Circus]

Those look male to me. In the 2nd pic you can see that it has a gonopodium. Young males often look like females (that bit me in the butt once) before their color develops.

 

[emeraldking]

They're all male. No doubts about that.