DS's getting bent is pretty common CJ - dont feel bad.
a driveline shop can balance the DS. a dynamic balance will balance the entire assembly, vs a static (DS only) balance, which does not take the adjoining rotating components into consideration. not unlike getting a wheel (only) balanced and then throwing some tires on and getting a shimmy from imbalance. same for the entire driveline (with the DS being like a wheel and getting the weights added to it).