Why are your tracks in stereo? You can't really "pan" a stereo track. All that will do is favor the left or right side of the eave.
However, as moskus said, it looks like you have the same thing going on in both the left & right sides of the stereo wave. It looks like you recorded it in stereo, but also panned it at the time you recorded it.
My suggestion is to convert the tracks to mono (or record them in mono) and then try panning them.
I think you will find that solves your problem. Also, FWIW, it is pretty customary these days to leave the bass panned center.