Hmm...that's a LOT of conditioner. Maybe it's too much moisture? I know that if you moisturize your skin with too much lotion or your lips with too much chap stick, it might fail to produce moisture on its own. That's happened to my friend's skin before and can probably happen to hair. You have to let your skin and hair product their own oils instead of having to rely on a foreign source.
But I don't know. Maybe the over-moisturizing thing doesn't even apply to hair
That's just what I heard, haha.