Yeah the rotor move's like that until you put the wheel back on and tighten it. You check bearing play with the tire mounted. Just by the sound of it I would replace anyway, the new ones will outlast your car. I'm more worried about what was rubbing the inside of the rim. You need to put a wheel on the side that was rubbing, let the jack down, turn wheel lock to lock, feel on the inside of the entire wheel for something hitting. Hate to see a guy go a summer without custom wheels
To check for bearing play put your hands at 9 and 3, feel for any movement. Your not supposed to have any movement at all, or turn the tire as fast as you can then grap the strut, if you feel any vibration in the strut its a bearing