Background: I am using this for a very large Olympics style event in Washington, D.C. I have a category for all sports venues - about 60 of them. Within the venues they are assigned to 8 bus transportation hubs. The idea was the have a generic large venue icon but with 8 different colors to associate that venue to a transportation hub. This would limit the number of categories and keep venues together. It's a visual thing.
So once I had all the venues linked to K2 and then manually changed the icon on Hotspots, if I update that sports venue the icon would revert back to the generic icon assigned on Hotspots and not keep the custom icon.
Hope that provides better insight.