If you believe that AND you believe Genesis 8:4, then there's another contradiction - could you explain please?

Well, here's how I think it goes. "The world was flooded" - "But there's not enough water". "Oh. Then the earth must have been much smoother so there was enough water to go round." - "But then where did Mt Ararat come from?" "Oh. Then there must have been mountains raised AFTER the flood".

Otherwise known as 'making it up as you go along.'