I just received my Darkglass Vintage Microtubes yesterday from Sweetwater brand new and I'm so excited because it's my first Darkglass pedal. While testing it I noticed that the pedal's overall signal increases while I add more Drive, even if the Level knob stays in the same position. It's a bit annoying because it's throwing me off unity gain and I have to re-adjust my level every time. I don't remember noticing this on the demos on YouTube that's why I'd like to ask other VMT users out there if this is normal behavior or did I get a defective unit? If normal, how do you compensate during live gigs? Thanks in advance.