Having and issue with my expression pedal. Using an Ernie Ball VP Jr 25k. I'll go to my pitch glide- have the toe side down and plug it in. No problems. I adjust the pitch to +24. Great. Then move the pedal to heel position, I adjust to +0. Now, when I then use the pedal and return to toe position- the pitch value only goes back up to like +21.9 and also kind jumps a little- +/- about a quarter step. Is this a bad pedal? or is there something else I'm missing? Any help would be greatly appreciated. Thanks.