There's only one relevant setting - Send value on on preset change. When turned on, it will send a value based on the current expression pedal position after you change presets. This will effectively override whatever value is in the pedal's preset. Turning it off will make the Mastermind not send any expression information until you move the pedal.
In reading your post again, I think there are two ways to do it:
1). Set up your H9 presets so that the parameters are saved as they would be in the heel down position.
2). Add a preset action to your Mastermind presets that sends the same CC that the expression pedal does in the heel down position.