You start the game with zero xp. You're first level.
How did you break your oath already?
It is also possible that not only the Dark Urge lacks some memories, but also Tav.
D.U. :
The DU just thought they where a Oathknight, but the impulses are too difficulty to overcome.
Tav:
Already broke the Oath before the start. The Tadpole that weakens them made them forget and the conviction that the oath is still there is what gives power (maybe with tadpole help). But since you played someone who has already fallen, your lie - even to yourself- is quickly exposed when you loose patience just once.
