I apologize if this is not a bug, but under the challenge event, it had 3 locations to explore, and when I did the most advanced, the other two disappeared so I can no longer go to them. Is this supposed to happen? If so, why? I wanted to leave the easier locations for when I was short on time and started with the most advanced as I had time to do it now. I am put out that this happened and I am confused as to why this event was not set up as a heroic adventure if I was supposed to do it in a certain order.