Google Analytics Landing Page Metrics

Does anyone know if it is possible to show the accurate figures for bounce rate, pages/session, avg. sess duration by landing page? 

When I attempt to show this data at page level it is not correct. I have tried so many different ways of producing the right figures, such as creating my own calculations rather than just trying to pull them in from GA, as I realise there is the issue with pulling in rates/averages. I've even tried exporting into excel and then getting the data from there, but the figures are still wrong when I try and summarise them in a table. 

Thanks