Staggered nutrient? I just throw in the organic raisins and forget it. The only total failure so far was trying to use recycled deek park spring water bottles. There was an AWFUL after taste from the plastic. Yuck! We had to throw six gallons of it in the trash.
The ancient orange that blew up a bit didn't taste good, but I'm almost sure it was from the three packs of yeast when it only needed one. Does that make sense from your expertise? Could it have been opening the bung mid-brew instead?