Thanks everyone - I did manage to solve the issue. Some text in the last section seemed to be corrupted so I copied it, deleted it and then reentered it and it seemed to right everything .
As for the TinyMCE editor when I select it as the default editor I end up with blank screens? It may be something to do with the way our Moodle is hosted as it's managed from outside and I don't have anything to do with that side of things...I can see Atto would be easier for mobile devices, although we're not there yet.
Appreciate the support everyone.