Well, now I at least know I’m not incompetant or nuts. That lack of help from Musicom or Eventide on this is pretty frustrating. Musicom has settings built into their software to control this stuff and it doesn’t work. I think the H9 and expression pedal use with the EFX pedal switchers is pretty common too. I’ve tried to simplify and isolate the issue to no avail. I can set the range but that’s it (and like you said, there can be some odd, jumpy behavior with that as well).
I pretty much have to rock the expression pedal immediately after making a patch change which makes the expression pedal pretty useless because I can’t start it at ZERO. I always have to depress it and reset it to turn off the parameter it’s controlling.