That's pretty standard with my basses. With the +20dB switch off and the gain maxed out, it's like moderate/heavy overdrive - not full distortion. Plus, if your tone knob is on the lower side and the shift switch is up, that seems to have less emphasized breakup. Then your clean volume will kind of eat into that once you start blending that in. So it sounds normal to me...
Yea good point, I have to mess around with it more.

