So in all honesty that manager from unknwn could have been selling to a celeb client, It is Miami, and it is Lebrons store.
He may have hooked up one of his family or friends. To be salty about that is childish, i mean you waited in line and got a ticket right? so now you have chances to win, and him selling one pair to someone else was most likely additional stock Nike sent for Lebron to give to people he knows, and your chances of winning probably didnt slim by much.
So pray to the sneaker gods to be fortunate of you, and keep it moving. Im just giving a realistic option not even being a douche