did you have the smoker on a high temperature? most people will tell you not to soak your chips, or not to spray your saw dust, but if you did you would get a more consistent smoke out of it, it would have less of a chance of flare ups like you had, and some folks will tell you the smoke flavor will be less bitter, all personal preference,
IF your making sausage and are trying to smoke at a low temperature if you wet your chips down you probably wont ever see smoke but at low temps I have never had mine flare up either.
also the little flare up episodes probably wouldnt have much effect on what ever your smoking, again unless it is sausage