I just purchased Nate Smith's Citrus Bomb IPA extract recipe kit from MoreBeer and entered the info into BeerSmith. The recipe indicates IBUs of between 55-60, but the software is indicating it will be over 100 IBUs. The recipe calls for 1.5 oz of Magnum hops for 60 minutes, 1 oz of Columbus for 30 minutes, 1 oz each of Columbus, Citra and Centennial for 1 minute. Has anyone tried this recipe? I am curious to know how it turned out and why the software is showing twice the IBUs.