Kaseya Center Chaos: LET US IN

Why do they open the doors only one hour before the show is supposed to start? It takes more than one hour to load 18,000 people past security and into the arena. I was lucky enough to see Gaga on Sunday and it was miserable standing in line for an hour to get in. I feel really bad for the people who were stuck in line and didn't even get to see her yesterday :(