Right hand thread/left hand thread 68 charger????, pressed on drums?????help!!!!!!

Sorry The "passenger" side went easy. When we got to the drivers side, nothing works. Its the "drivers side rear" wheel that is stuck to the car because of the spinning lugnut and stud. The stud and lugnut are stuck together. On the center of the axle, as if you were looking at the drum/studs, there is grooves, like threads, but they are wide threads. Theyre not like a bolt's threads would be. Theyre more like a bottle cap if you know what i mean?

I have never ran in to that before.