Comment on Duplicate Yoast SEO Open Graph Meta Tags by John Buxton.
Working through your suggestions will be done by Monday just to let you know I had a support ticket on a related post issue that was sorted I asked a question about a Yoast and Avada issue and they told me;
There are no known conflicts with Avada and Yoast and there should only be one meta description.
So as you quite rightly pointed out I have got rid of all meta descriptions in Yoast and will let you know how we get on
Many thanks for the help its been invaluable will look at your themes later this week
Regards John Buxton