Double Aracanus?!
I founded my own kingdom and made Aracanus one of my vassals. My kingdom got wiped out and Aracanus soon became lord another faction. Time passes and I found my own kingdom once again. I send an emissary asking Aracanus to join my kingdom and happily get a message back that he accepts my request.
But instead of returning as a lord, Aracanus returns to his long ago role of a companion, though he is now listed as Lord Aracanus. There is no option to ask him if he'd like a fief. Disappointing, but OK.
A bit later I come across a party of my kingdom patrolling the countryside led by Aracanus! He has a band of 60+ Perisno troops and a few Arcane Defenders. When I talk with him I have the option of welcoming him back (as if he were a companion), or I can tell him I have no room in my party for him.
This has persisted for a few in-game months now. Could be worse.