ToME: the Tales of Maj'Eyal

So I'm playing rogue dualwielding daggers and I have a dagger of projection. When I use his projection ability it hits the target twice. Is that working as intended or is it a bug because I'm dualwhielding? The other dagger doesn't have projection ability...

The projection allows to project a distant melee attack. If your melee attacks consists of 2 strikes, because you are dualwielding, the target will be hit twice. It is the normal behavior.

I see, thank you.