Imperial Legion: Promotions ("Knight of the Garland")

Right after the Imperial Legion quest "Lord's Mail" where you return the Lord's Mail and Chrysamere artifacts to Varus Vantinius, there's a bug/issue with getting to the rank "Knight of the Garland". Right after you give Varus the Paladin's Blade, the promotion subtitle up on top of the screen shows up and says "Promotion has been accepted..." before selecting the dialogue topic "advancement". When you click on the "Advancement" topic, he says he's unable to promote me until I've done enough duties. Selecting the "Orders" topic is pretty much a given, at this point...