Although it is possible to have people listed twice it's more likely to be 2 different people with the same name . They could be related .
A Enoch Locke married Priscilla Smith in 1900
 Enoch and Priscilla Lock parents of Noah 
ENOCH  listed as hawker  of no fixed abode on baptism of their son Noah in 1904 . Radnorshire Wales  If that helps  it could be yet another couple !