Quite possibly a duplex. Hard to tell how the rear unit would be numbered - usually that is determined by which way the front door faces, even when the two units are in the same building.

Judging from the "scale" of the neighborhood, I'd guess the vacant lot was another house. In any case, that is the "even" side.

I'd bet it is the correct building, and that some numbering tweak has occurred, as noted above.