IGI batch 6931616, p. 76, lists marriage of Polly Pettit & John Berry on 29 Dec 1807 in Fayette Co., Ky. Batch 6931618, p. 95, lists same marriage on 30 Dec 1807. I have not sent for these batches, but from other entries in the same batch, it appears to be an "independent extraction", so to speak, of Fayette Co. court records, rather than a family-based submission. Probably the first is a bond date and the second is the actual marriage date.