Hi Terry
First, on posting, please supply placemark as attached kml/kmz OR as text: 51 03.495'N,0 01.625'W - It took me, more than one minute, had to manually put in the coordinates in GE in the correct format, from your image, to initially find your originally spot and place of the issue. Thanks
At the moment I dont see the change in icon. I'll try more experiments.
Tom