Not just pairs

Any time I've heard the story of Noah told, Noah is always taking 2 of every kind of animal. In Genesis 7:2-3, God says that is only for unclean animals. For clean animals and birds Noah was to take seven! If I'm reading this right, it's actually 14 - the impression I get is that a pair was considered as one. Amazing how much of a story can be lost unless you go read it yourself!