Note that the heading in the box is singular but the resource and the preview (marked by arrows) are in the plural.
Yes, but it is not a discrepancy in the Search results. "Author of lamentations" is the only result in that article (boxed); which is a Headword, whilst the text "Authors of ....." is a Heading.
"Authors of ....." is a Heading.
Exactly - all three that I marked are headings which is why I expected consistency. It is as if the title in the Search results is not driven by the title in the resource.