Expression pedal not updating after save and then change.

when I save my patch with expression pedal settings, everything is fine and I like it… it's saved and works the same next time I boot up the pedal… BUT sometimes I want to change the way the Expression pedal behaves and the changes don't "take".

for instance, if I have the expression pedal doing a mix move and in a performance I find the mix too light… i adjust it by moving the pedal to heel, turning the knob to where I want, mixing the pedal to toe, turning the knob how I want, then when I go back to heel my new setting is gone… so the expression pedal settings are not updating. I don't know if it's only in one of the models, but I know it happens in the mod delay model.