Did they mess up?

[Master Dragmire]

I can see why Vaati made that mistake.
After all, one in Espanol, is Uno.
Uno-Unisex.
Very confusing.

[Keaton]

And also, according to it, multisex isn't a real word.

I think someone needs to tell your mom that.

And yeah, names really mean nothing.  Now, if they shared a similar sprite and role in the storyline, THEN that might mean something.