Look at this:
http://www.auym23.dsl.pipex.com/show/show.html

Same bit of music on mics A and B. The only way I can explain such a
discrepancy in the volume envelopes is if the mics were MUCH too close
to the clarinet. That would explain the excessive key noise too.

Want to try again with the mics at least a couple of feet back? That
might give something more meaningful.