Torque those two bolts on the outside of the head to 7 ft-lbs. They will strip or twist off if you tighten them any more than that. I would also put anti-seize on those two bolts so they will come back out easier the next time you take them out. Those two bolts tend to seize up and twist off a lot.
For the other problem, I would try to tighten the stud down even with the other one and hope the threads aren't stripped in the case.
Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!
You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.