No worries.
I don't know anything about Tascams, I was under the assumption you was working within a DAW and you had 2 identical guitar tracks.
My suggestion was just to confirm without a doubt that the 2 tracks are identical because if they are, if you was to flip the phase on one of the guitar tracks then you should get dead silence, and this would mean that hard panning those 2 tracks away from each other would not create a stereo image (because they are identical). If you do hear something then you are hearing the differences between the 2 guitar tracks meaning that if you pan them out then you would be correct in your judgement that you are hearing the guitars in stereo.
I'm sorry I can't help you with the Tascam stuff.
edit: Just to clarify, your guitar tracks must be panned to the same position (Just keep it center for the quick test), and they must be the same volume. How you flip the phase on 1 of the tracks is different from DAW to DAW. In my DAW I need to insert a specific plugin and hit the phase invert button.
I do this test quite often in pre-mixdown. Sometimes I get stereo tracks of say.... a kick drum. If I am unsure if there are stereo effects printed on the track and is intentional then I insert a phase plugin on the stereo track in dual mono, then flip either the left of the right (in mono) I am checking to make sure I hear silence, if I do then I can throw away either the left or the right track. I COULD! keep it but I am just a bit anal about that kind of thing. It bugs me out, and it just cuts down on the megabytes and CPU usage a bit
Oh also.... there is a possibility your 2 guitar tracks may be a few milliseconds out of time with each other, so it will sound really wide when you hard pan them, but will probably sound pretty poor when both panned back to center. Flipping the phase will confirm this aswel. If you hear silence, you're good to go, if you hear stuff going on, your guitar tracks are not identical, or they are out of time. (assuming they are the identical level and pan positioning)
Hope I didn't confuse you further