I can answer this one guys, and guess who's responsible for it?
The TOCs? ATOC? Network Rail?
Nope -
TheTrainline!
When they developed their online/call centre booking system (called TraCS).
Where there was places with multiple stations/bus links and if this coincided with the fact the main station was the name of the town (e.g. Bedford, Reading, St Neots) they added 'Station'. I remember the drop-down menus from it came into being, for example, under Bedford they had:
Bedford (either)
Bedford St Johns
Bedford Station
Initially they didn't differentiate the station groups, thus giving the appearance of several new groups. In later builds the official station groups were added.
So in short, ~ Station appears where the Trainline do the relevant website.
Hope this helps
