El Dorado bugs? (Campaign)

Playing the Campaigns on HD at the moment, decided on El Dorado first. I'm on El Dorado-2 on Moderate.

I get across the river and find the Imara village, defeat their army, and the game asks me to bring Francisco (hero) to the village chief.

Unfortunately, he is still considered a "Spanish" team mate instead of my unit. Do I need to drop the army in a specific spot to get control of him?

I have tried dropping at the village gates, the beaches by the river, and each of the small islands. I've even tried dropping the conqs, killing the army, THEN dropping him, but I still don't get him on my team. Any help?