Matthew,
A few questions:
When did you start your spray and how often? Timing is everything.
When you said your use those chemical, were they ready mix in one bottle like a Bonide Fruit Tree spray or you spray each chemical separately?
Have you heard of Clemson peach bags? If you bag clean fruit, nothing get through Clemson bags. I have used all kinds of bags and know that organza bags do not work but Clemson bags do.
This is a long thread about bags and bagging, you can just scroll down to see pics of Clemson bags.