I'm trying to add .55 ounces of Nelson Sauvin AA 12 % as a first wort hop in an attempt at an Alpine Nelson Clone. My recipe editor displays 13.88 IBU's for a first wort hopping, very low. If I change the same hops to a 60 minute boil, the IBU's are 22.92. It is my understanding a first wort hopping is an addition right after the mash and before the boil, and would be included in a 60 minute boil . Beersmith says to take the 60 minute boil and add 10% more IBU's for a first wort hopping. My question, is my understanding of a first wort hopping correct? If so, then why is the First wort hopping IBU's in the recipe editor so low? Am I entering this wrong? Thanks for any help.