George Washington Baines, Sr. (December 29, 1809 – December 29, 1882), a maternal great-grandfather of U.S. President Lyndon Baines Johnson, was a Baptist clergyman in Arkansas, Louisiana, and Texas who served briefly as natural science professor and President of Baylor University at its first location in Independence in Washington County, Texas.
George Washington Baines died on his 74th birthday.
Based on the given birth and death dates, George Washington Baines died on his 73rd birthday, not his 74th. I think the system was confused because his age is never explicitly stated, just the dates.