https://www.wikitree.com/wiki/Harrison-8192
https://www.wikitree.com/wiki/Butler-12695
http://www.wikitree.com/wiki/Butler-9113
I believe that Thomas Harrison 111 was married twice. Looking at his profile... he had one child with William Butler Harrison with Nancy Ann Butler and he was an only one child. Then he married Mary Ann Butter and a lot more children. His first wife may have passed away and he has married her sister...or something else...
Hope this helps