k1960
I hope the following clarifies the questions. I'm not that used to editing and have therefore not made the necessary updates myself. I trust you can make the neccessary corrections. 
• The decent is estwards from Gångväg #157823843 (layer -1) to train tracks 3 (https://www.openstreetmap.org/way/157823860) and 4 (https://www.openstreetmap.org/way/157823862).
• The same applies to Trappa #157823839 that decends estwards from Gångväg #157823843 (layer -1) to train tracks 1 (https://www.openstreetmap.org/way/157823853) and 2 (https://www.openstreetmap.org/way/157823858)
• Regarding Trappa #157823831: This decends from street level down to Gångväg #157823843 (layer -1, i.e. street level is in the north end of the flight of stairs).
• Further, Trappa #157823828 decends from street level down to Gångväg #157823843 (layer -1, i.e. street level is in the south end of the flight of stairs).