When people start playing around with end shake on the balance and escapement, all sorts of problems can happen. It is a process of elimination. The first thing to do is check all the stones, make sure they are in tiptop condition. If you have removed, the caps make sure you have put them back the right way and in the order, you removed them. Check the staff. Make sure the hairspring is correct and not touching something. In the end, you might find the only way to sort it out is by getting hold of new parts. If someone has been digging around with the balance cock and the bottom plate, you might never get things right.