Yes, changing the input to Left solves the problem.
I believe the Focusrite is acting as the sound card, but nevertheless: I don't see any windows 10 sound settings that solve the problem: http://somup.com/crVXXrojpV
I just recorded something on track #2. When I arm track #4 to start recording, it's including track #2. I'm recording with a Focusrite Scarlett Solo direct line in. Am I missing an obvious setting or change?
Short video demo: http://somup.com/crV63AoiMQ
Thanks!