Hi Rashida,
Thank you for your help. The video you attached answered my third question.
How do I add the intro text in Joomla Editor without it overriding the SP Page builder layout? When I added the intro text block to the article text field in Joomla editor the live site has resorted back to displaying the standard joomla article layout rather than what I have set in SP Page Builder, even though the SP Page Builder page is still there when you go into that editor view.
Example here on the article titled 'Minister launches new broadband network in Eastbourne':
https://www.cloudconnx.net/stage4/news
Thanks