Thanks Jennifer! The only segment I am using is a basic geographical one - filtering activity by to a single city. When I remove this however you are right, exits appear and the next pages add up to 100%. Must be something in the config of the segment? Thanks. 

When I use the flow diagram to see which pages users are going to next (from page name in centre), I would have thought the next pages % breakdown would all add up to 100% but it doesn't. Can somehow explain how to get an accurate picture of where users are going to?