Must be adding up incorrectly. The retroactive only includes June base pay, June overages/premiums, July base pay (no overages or premiums), August overages/premiums (at old rates and no base pay), and September base pay for both periods. This is stated in emails, website, and the paystub itself, and is correct for me.

So we are missing retroactive for July overages/premiums and August base pay and overage/premiums.