You are right. But the <metadata><igoicon><filename> inside the kml is exactly the same with the kml name in [Only registered and activated users can see links. ] site.
Let me add you comment to the first post

[Only registered and activated users can see links. ] updated with additional alternative icons and one correction on Everest icon

Spoiler: additional alternative icons
Admiral1 Admiral2 Cyclon1 Everest3 Kia3 My Market2 ZARA1