When using the Ore Anomalies Map filter, there will be several sites that are shown in green and display 0 sites detected when you mouse over the system.
If you then warp to the system, there will be no ore anomalies currently preset. And then if you scan all signatures in the system, there will be no ore anomalies at all.
Why then is the system even displayed in green if there is nothing there at all? Or is there something I am not understanding. Or is this a bug?