I'm having a lot of trouble figuring out how to calculate the Monk's attack bonus, for some reason it seems stupidly low.

If an attack power has the keywords Full Discipline, Implement, Psionic. The power uses Dex and the attacker has a Dex modifier + 1/2 level of 4. The attacker is attacking with a magic dagger +1.

The total Attack bonus I come up with for power's like Crane's Wings and Open the Gates of Battle is +5.

Are my calculations correct?

Does the monk always have what seems to be a low attack bonus?

Because he targets other defenses?