What is currently mapped as the station building has a fixme asking to check whether that building really crosses Coopers Row. At first sight, I suspect the station is at most two buildings each side of Coopers Row, with a bridge or railway arch between them to support the rail platform and track. There are other anomalies too. America Square is 13 storeys but has no defined layer so it sits entirely below the tracks and platforms which are layer 1. It also has a name_2 of ETC venues which I suspect does not occupy the entire building and therefore should be mapped as a point node wherever its signage is located (or removed altogether if it has no signage). There's also a building visible on bing but unmapped, which seems to be suspended above the tracks over Coopers Row.

Once that is sorted and the existing "building" split where it crosses Coopers Row it should be possible to add the sidewalks without warnings about the sidewalks passing through a building. 