Sounds like your interface is set up to record in stereo. This is the default but what you want is 2 mono tracks. Go to Song/Song Setup/Autio I/O Setup. There you have the option to select mono channels. Click 'Add (Mono) and then click the square in the grid under 'ip 1'. Then do the same thing again and this time click the square under 'ip 2'. Then click Apply. (Most important! I usually click OK too, just to be doubly sure!)
Now when you go to track view, in the drop down below MS etc you can select a mono input for that track - eg track 1, input 1, track 2, input 2'. You should now get 2 separate mono recordings that will default to the centre postion but can be panned at your will.
If you're not going to be recording with stereo mics or devices it may be worthwhile deleting that option from the Audio i/o setup and saving this setup as a template.