[MEvang]

Here's the problem with cutting the rear drums. The center hole is quite big on these drums, the larger this hole is the harder it is to get the drum to center properly on a brake lath. The larger mounting cones can also more easily be off. Add to this the fact that most shops brake laths tools are rarely if ever trued up, and the lathes are rarely if ever properly serviced Finaly most tech know little about how to properly set up a lath for cutting.
In my opinion if they had to do two cuts on your drums they screwed them up. You can check them by simply jacking up your truck and spinning the wheels by hand. You may have to adjust the brakes a few clicks but if you feel the brakes getting tight then loose as the wheel turns, your drums are done for.
They will need replaced.
Mike