The station is very small and cheaply built, so it might have been cheaper to make two tracks on one bridge and then have the "people platform" on each side of the tracks instead of between.

Just like this place: https://goo.gl/maps/gwfGxdxDs4sbpF2S7

Or this with a station on a curve: https://goo.gl/maps/Eo5fZK5E8kYoFAuW8