There's an IGI entry for a marriage on 11 Oct 1781 at Shillington between James Benteman and Susann Sheffield, but it's a member submission. I understand that a few years ago the LDS started a clean up of the IGI be removing extracted entries where there was an identical member submission. The logic escapes me.
But you're right that you need confirmation that the entry is real, and not one of the flights of fancy member submissions
David