Nah, they are not reversed. The vintage photos are taken from the left front of the house. Look at the same picture from the left front that you posted, and you'll see 2 less windows in the front left room of the house (they've obviously have been bricked up today). The left side of the house in 1860s was only the depth of the main house, not the extra addition. I've been to this house on numerous occassions.