This is correct.  I moved the magical bows ability (which was +25% damage vs beasts) to Irane's Hunter ability (and upped it to +50% damage vs beasts) so that she gets it with whatever weapon she uses.

The problem with having her start with a cool weapon is that she didn't have much room to upgrade.  Getting a new bow through shopping, quests or loot is fun, so I start her with something worse so she can upgrade.  And since she keeps that anti-beast ability through the upgrades it works ut best for everyone.