5 man scrimmage kick coverage

[l3will]

Last year I moved from one state to another state and subbed for various varsity crews. In all of the crews
they move the umpire from behing R's side of the line
of scrimmage and place him on K's side of the line of scrimmage opposite the referee, thus flanking the kicker.

I did ask why and never got a good explanation for
this different coverage. Anyone have a good expanation?