At this point I called it a night. I checked the discussion again today and so far there are still no answers to my questions and a few atheist trolls have turned up with their usual mocking and intellectual dishonesty, so I'm leaving it there for now. I'm interested to hear what others thought of the discussion.
UPDATE: About a day later I again pressed NZ Atheist to account for logic in his worldview. I got a long answer that didn't give a direct answer. Here's what was said: