The death date of 1880 is way before Bethel Church was relocated here. Unlikely, but possible, that the grave was removed to here. More likely, the stone was 'saved from cattle' and taken to this cemetery by some well meaning person...or even removed from the weeds of Old Bethel.
The caretaker at County Line Cemetery showed me two similar marble stones that were brought to him by a lady from another county to be placed in that cemetery. The practice, sadly, is wide-spread.