My gold eagle 1987 one ounce coin doesn't have the building reflection on bottom left. Other gold eagles seem to have reflection. The bottom one is my Gold eagle, the top picture is the normal one with the building reflection on bottom left to show what I am talking about.
That coin looks perfectly normal to me. The design has been slightly modified over the years so newer versions of the AGE are a little different. But, I don't see anything here that looks abnormal.