I take it by this you are referring to S.K.Baker connected with the 12th edition of Rail Atlas Great Britain and Ireland, of which I have a copy.
Look at the expanded Glasgow area view on page 82 where you will find a definition of all stations just shown as a letter on the map, where you will find the following:-
1)...Pollokshields East
5)...Pollokshields West
Therefore Pollokshields is shown twice with the correct spelling.
I have also looked at the index on page 118 and both the east and west railway stations of both Pollokshaws and Pollokshields are spelt correctly.
Back to the quiz......
Pollokshaws East