Is anyone out there researching Leverett Hudson C Evans, son of Daniel Evans? He married Selena ?, and then Nancy C. Brown.

In searching other members trees I have found TWO gravestones for Leverett Evans in the same cemetery. One is for Cpl. Leverett H Evans, and one is for Leverett C Evans, resting beside his wife Sarah. My question is this... why 2 headstones? There is a slight difference in both birth and death years (by a couple years each). But what are the chances that this is an unknown relative that was born, died, and buried all at the same time and place?