One thing to try:

Options -Preferences
Audio tab

Check the dropdown for 'Input Channel for MONO Tracks'.
(Set it to L & R for left and right side)
Now if you import you should get both channels, but on separate tracks.
This may happen (depending on version) if your track type is set Audio MONO. It won't do this in recent versions but there was a period of time where track type was an issue.

You can change this default under the General tab. Or right-click the track and make it Audio Stereo as 'type' if this is indeed the issue.

What version?
Do you have the most recent update for that version?

I do not work here, but the benefits are still awesome
Make your sound your own!