Jimmy;
Yes, I know it's tough to idiot proof your work once you are gone.
I thought that most of the new fixtures came with multi-volt ballasts, but you just killed that.
Just a thought, did you try the circuit with the ballast ground conductor disconnected? If it still trips, and the ballast is leaking to ground, then you could try putting fiber/plastic washers to isolate the ballast case from the fixture body. (Internal leakage to ground). Keep the fixture body bonded at all times. You could then contact Lithonia to determine if they will replace the ballasts.
Just a thought...
