Ann Arbor Home Buying

Our office has been in our current location for about six years. We've had from four to eight of the top real estate buyer agents in the state here. However, to this day we still have people coming through our front door thinking they are going into our neighbor's door. Probably at least once a week this happens, and sometimes it happens a couple times in one day. I don't get it. Here is our front door:

Here is their front door:

I guess it is nice that people want to walk in our door. But why do they?