Can you give a reason why one side is louder than the other? If it was an error in setting the levels properly, then I would fix it, if it's because one side of the stage was louder than the other then leave it alone otherwise the stereo field will shift.
When recording in stereo it's always a good idea to set up the levels with a reference tone so that you know they are equal. You also want to space the mics so that they are equidistant from the source, not only for level reasons, but also for proper phase. This is also the reason many used a matched pair of mics for stereo recording, so that the characteristics of the mics are as close as possible.
BTW are you really see a 2 Db RMS difference or is it peak level? I would be less concerned with peak, 2 Db RMS is significant.