I figured it was an issue of how much signal is being allowed through. I put it up for sale so I ran through all the controls to make sure it was working properly and couldn't remember ever maxing the controls like that. Anyone else notice the same phenomenon?
I emailed you back as soon as I woke up. The mids knob (like on the Way Huge Swollen Pickle) is an addition to the circuit; therefore, it won't act like a "normal" muff. Yes, that is normal for muffs with mids additions.