A small quirk I noticed on the map

It just occurred to me, while looking for the Jefferson Plaza mission, that it's located in the "Southwest" district of the map. The problem with this is, "Southwest" is actually in the south east portion of the map. It's underneath the East Mall, and opposite of the West Potomac Park. Shouldn't the title of the district be "Southeast"?

The more thought I put into this, the more it just doesn't make sense. Send help.