I wouldn't alter lineage based on the marriage reference. It's probably a mistake in transcription? On 1850 Franklin County, MS census, the head-of-household enumerated as William G. Moore. On 1860 Jefferson County, MS he's enumerated as W. G. Moore. Cynthia's find-a-grave memorial in Anderson County, TX indicates she wed William George Moore 1 Jan 1847 in Mississippi. Order a copy of the marriage certificate.