Not to belabor a point but while Samuel was likely not married more than once, it does appear that Clara Light was married prior to Samuel.
The 1900 census shows Clara E. Voss born Sep. 1879, with a daughter Clara M. Voss born Aug 1899, in the home of Benton and Mary E. Light and living in Erath County, Texas. Clara was shown as married at the time.
The 1880 census shows this family in Colville, Benton County, Arkansas.At this time Clara was 8 months of age and born in September 1879.
That Clara was married twice likely prompted the confusion regarding Samuel.