I can help with that, for SteemTrail at least. We ALWAYS vote 100% with the trail. To my knowledge, there aren't exceptions. You can check the main SteemTrail vote to verify.
However, we cannot control how much voting power is delegated to us. We just vote with what we have. But there's no way for those following our trail to be able to change their percentage on a specific post without doing so post de facto. I know that doesn't help with the results, but hopefully it helps with understanding.