Gender confusion

So, Wonder Wife ran across some greeting cards and said that once she saw them, she had to buy them for me. Here's the first one, called Heroes & Villains:

Let's see, we have:

• Darth Vader,  Iron Man, a Tusken Raider, and Robin (Burt Ward version)
• Some bug guy I don't recognize, Bobba Fett, another guy I don't know (although he puts me in mind of J. Jonah Jameson's son in his Man-Wolf identity), and Batgirl (Yvonne Craig version)
• Robocop,  Red Power Ranger, Batman (Adam West version), and C3PO
• Another guy I don't know, a Storm Trooper, Spider-Man, and Skeletor.

A fairly wide-ranging group. Odd to see C3PO without R2D2, or Skeletor without He-Man.

The next card, Heroines & Villainesses:

This one has:

• Batgirl, Poison Ivy, Wednesday Addams (I think), and Storm
• Sorceress of Castle Greyskull, Wonder Woman, Dorothy Gale (Judy Garland version), and Catwoman.
• Pink Power ranger, Uhura, the Wicked Witch of the West, and Supergirl 
• Evil-lyn, She-Ra, Princess Leia, and someone I think I should know but don't - is it Hit-Girl?

An even more wide-ranging group, I think.

The non-traditional style of illustration just seems to add a more fine-arty cachet to the pieces, and the Warhol-style array design drops these works squarely into the Pop Art bucket for me. They're pretty cool - it doesn't show here, but the colors really pop on the printed cards - but one thing I can't figure out.

The first piece is Heroes & Villains and the other is called Heroines & Villainesses. The use of the almost-totally-out-of-style feminine forms of these words clearly signal a presentation divided by gender.

Then why is Batgirl on the Heroes & Villains card?  She is the only female depicted in the group. She is also on the Heroines & Villainesses card, though, and there are no males depicted in that group at all. I can't get his to make any sense - is it an error, a message, a change in focus, what?


I like these cards but it;s hard not to let this bug me.