Dear Barry,
I’m afraid my last message didn’t come across the way it was supposed to in fact, I respect and use everyday the Genesis framework therefore, I didn’t doubt even for a second the fact that “the problem is not the Genesis framework itself”, and never suggested it was.
What I said instead was that the Child Theme is the issue here so thanks so much for advising a possible route to take. It looks like a long and painful one though.
I will have to take some time before getting back to you with the results I got from testing.
In the meanwhile, please, if anything else comes to mind do let me know.