I did a builders warranty inspection yesterday where the aluminum gutters were nailed to the aluminum facia about a 1/2 inch to 1 inch below the drip edge. Looking up light is visble between the gutters and the facia and there is staining on the backside of the gutters from water dripping down the backside. The builder did gutters on the front only in the entire community spaced this way.
Generally, I see the gutters installed higher than this with the highest point under the drip edge and at the lowest point just under the lip of the drip edge. The owner had a gutter installer come out and install gutters on the back side of the house and installed them as I have seen them in the past. The owner wants it written up in the report, but I am just curious before I do as to whether or not this is considered a real issue.