Track volume control

Hi I’m new to the 5 moons having just picked one up second hand. I’m seeing a weird glitch - when I’ve recorded a loop on track 3 the volume doesn’t respond to the track 3 slider but is combined with the volume control for track 2. So when I move track 2 slider the volume of tracks 2 and 3 change. Has anyone experienced this? I was planning to install the update to stereo anyway so maybe that will reset things…