When you strike a foe with a dagger and no shield equipped, you see a one-two combo each time you strike, plus the damage from each blow shows up.

What you don't get to see is a guy/girl carrying twin daggers.
I'd suggest you campaign to get all daggers changed to "pair of daggers" so it shows up as such, doesn't allow shields used, damage is listed as half but shows it hits twice per attack etc.

Because that'd be awesome!