I wanted to tell you I have now resolved this. However, I’d be pleased on some tips related to this issue if you have any.
I had been working on a windows based laptop and that is where I set up my website.
I moved to a MAC book this week
On Sparkling slider options, the category was correctly checked on MAC but blank on my old windows based PC.
Populating it with the category on the windows based PC worked
Do you have any ideas why I may have got into a problem with this? Does MAC operate significantly different for wordpress? If you have any thoughts, tips or suggested web references, I’d be interested to know.