Why list this film under another name?

One of my favourite British war films, and yes, I know that 'I Was Monty's Double' needed an alternative title for exhibition in the USA because its citizens might be puzzled as to who this 'Monty' might have been! That is fair and reasonable, and I recollect the scene from the film, which I saw at the cinema at the time of its release, where its American title can be found. What I am unable to understand is the current trend for British films to be listed on IMDB under their US titles. Surely this is unnecessary? David Niven in 'Stairway to Heaven' (1946)? Richard Todd in 'Battle Hell' (1957)? Surely the name of the film should be given as per release in the country of origin, and the 'aka' title as the alternative more meaningful title for overseas.