Aren't you just blowing all your clippings to the outside of your lawn instead of equally distributing them over the lawn? Or am I misunderstanding your method? It sounds like you are mowing and re-mowing the cuttings multiple times as you move the cuttings to the outside of the lawn. I always make the first pass around the outside with the discharge chute blowing toward the middle of the lawn, then reverse for the rest of the passes, blowing the cuttings onto the cut portion. I think that's how most people mow.