Did you follow the mob and witness this activity happen? WHat happen to the first claiming party?
I'm sure what ever it is, its being addressed in todays update. Maybe since it's F2P, the system is gradually being implemented area by area. What other colors are you witnessing incase I run into the same situation?

I really don't understand what the OP is stating, I think there needs to be more clarity and professionalism unless the OP is in elementary school. I think someone else should detail this report better. What say you?