With Land After ....................................... The clearance is only issued when the leading aircraft is a specified distance down the runway ..........
Hand Solo,
I suggest you are confusing "Land After", with "After the Landed, Cleared to Land", which
is only issued when the leading aircraft has passed a specified distance along the runway.
The conditions for "Land After" do
not include any 'specified distance' - the responsibility for separation transfers entirely to the accepting pilot.
Sorry if this sounds 'picky', but the two are very different!