I don't know what the law is in your state, but in some states (like AZ), the law is that you only have to enter the intersection when it's green or yellow. If

I don't know what the law is in your state, but in some states (like AZ), the law is that you only have to enter the intersection when it's green or yellow. If it turns red while you're still in the intersection, that's no problem for you, but other drivers have to wait for you to clear the intersection. So it's perfectly normal for turning drivers to enter the intersection and wait there, and then after the lights turn red and the straight-through drivers clear the way, the people turning will finish their turn, and the oncoming traffic with a green light has to wait for them to do this.