Sacred Servant Archetype

[mototom]

I was using an archetype in Hero Lab and I'm not sure it's working correctly. Or maybe I'm misunderstanding the class feature. With a Paladin with the Sacred Servant archetype, they can choose a cleric domain. If I choose the animal domain, the animal companion options that show as valid are still restricted to those allowed as a Paladin's divine bond animal.

I'm pretty sure this should open the entire druid list of animal companions—basically giving me the same list as if a cleric had chosen this domain. Is this a bug in how the archetype is overlapping with the Paladin animal companion options?