I think putting conditioner on your scalp can lead to issues that you wouldn't otherwise have if you were not massaging conditioner into your scalp. Your scalp produces sebum to keep itself happy but when you smother it with a lot of other crap, your pores take a back seat since you seem to have a handle on that. You leave your scalp nice and clean and your pores will get back to doing what they do very well until we start meddling.
Dry scalp may also be a sign of dehydration. So taking essential fatty acids and drinking water can go a long way in relieving dryness of the scalp, and skin in general.