Well, Kishimoto wrote the characters to say that each Pain only had one type of power.
Then he wrote it so each Pain only used one type of power.
But then the animators gave the Pain multiple powers.
End result:
Kishimoto writes the Konoha ninjas as observant and capable of accurately evaluating their enemies.
The animators make the Konoha ninjas out to be retards.
Kishimoto writes it so that Kakashi sacrifices himself to obtain the information that allows Naruto to fight against Pain.
The animators make it so Kakashi died learning something ultimately useless because it turned out to be bullshit.
So, yeah.
I think this is probably correct. Nagato is a living breathing person, so there's no reason why he should be limited to one ability. It seems like he has the ability to imbue a dead body with one special power.
I wouldn't be surprised if when they finally find Nagato he ends up being able to use the powers of all 6 of his Pains.