I was getting fed up with the theme I was using as it didn’t seem to allow me to show my posts in the way I wanted. So I picked a new theme, then spent ages trying to work out how to make it work the way I wanted. Hopefully it looks okay.
I realised that I have to make some changes to the way I post and also had to update existing posts so they worked how I expected
Somehow I feel my previous theme might have done what I wanted anyway. But hey you live and learn I guess (maybe I will switch back to to check).