Hello,
I’m experiencing a rather strange issue. When I roll the pitch wheel of my SP up, the pitch changes smoothly. When I roll the pitch wheel down, it smoothly lowers in pitch until it is almost all the way down, at which time the pitch suddenly drops a few tones. Similarly, with the master tune knob at the upper left of the unit, the unit is in tuen when the knob is all the way counter-clockwise. When you roll the knob clockwise, it jumps one semitone immediately, then from there it adjusts finely. Really strange!
I have initialized the active patch, initialized global parameters, installed the latest firmware, and this issue persists. When I use the shift mode functions to set the pitch up and pitch down ranges, I get unexpected behavior. Basically, whatever I set for the pitch up (2 semitones for example) seems to apply in a bi-polar fashion, meaning it also adjusts the bend down by 2 semitones. When I set the bend down parameter, this seems to define the “jump” I described when the wheel is almost all the way down. Furthermore, changing these settings sometimes results in bend intervals that are in between chromatic tones, such as a bend up that lands somewhere between C and C# when I’m bending from C.
Finally, the pitch wheel seems to throw my Sub Phatty out of tune by one semitone. Not all the time, but often when I even touch the pitch wheel, the Phatty immeidately steps up or down a key. Switching to another patch and back again seems to fix it… until I use the pitch wheel again.
I’ve dug into the deepest reaches of the hidden commands in shift mode, gone through every nook and cranny I can think of, ran the note calibration, etc., and I can’t seem to fix these issues. Any thoughts? I scoured these forums and Google before posting, but no one seems to have this issue. Guess I’m just lucky. 
Thanks