Hi
In terms of your panning issue; it sounds like you are recording to a stereo track. In the case of a single input, add an audio track and select the mono input your instrument is plugged into. In the routing tab you’ll see the mono input (1 or 2) and stereo output. The pan control in the mixer will now work.
In terms of the volume control - no idea but I’d suggest rebooting the iPad and power cycling the itrack