It's quite normal to record one mono track at a time. To hear it playback in stereo it's just a matter of panning a mono track to centre.
In the multitrack view, right click on a track and select record devices. If you're feeding the Audiophile 1/2 input left then make sure the record device is 1/2 left channel only. You will then record a mono track which can be panned. If you record to a stereo track then you will only produce audio in the left channel and therefore only hear it playback on the left.
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