The problem I see is that the EMS program is being called after the HVAC simulation. Try calling the EMS program before the HVAC simulation using AfterPredictorBeforeHVACManagers as the EnergyPlus Model Calling Point.

EnergyManagementSystem:ProgramCallingManager,
  myEMS Custom Controls, !- Name
  AfterPredictorAfterHVACManagers, !- EnergyPlus Model Calling Point
  myTempManager; !- Program Name 1