In the Religious Denomination question, "If atheist, please skip this question." should be replaced with "If non-religious, please skip this question."

Maybe even remove this sentence and add "non-religious" or "not applicable" as an option.

I think this is a very important change. I think there are many people who identify as Jewish Atheist, Buddhist Atheist, or Unitarian Universalist Atheist, (and maybe some others) and right now you are leaving it up to them to choose how to interpret the question. No information is lost by implementing this change, as there was already a question about theism.