If I ever got a moldy box, I would show it to every pipe site, Facebook anyone who would listen and then tell SG if it happens again, I will make your company sounds like a bunch of dead beats who lost alltheir tobaccer knowledge when the split happened.
I have close to 45 pounds of 3 SG flakes and they are great. If you can make it once you can do it again. There is never any good excuse for mold of any kind. All mine is from 2012 and earlier.