Ok, this may be a dumb question but I am a noob. I have done 2 extract kits which included making a 2 gallon wort and mixing it with 3+ gallond of water. Now I have a 7 gallon anchor steam ale clone recipe to do. I was told to do the entire boil (7 gallons) all at once without mixing. Do I just do everything the same that I have done in the past but with a 7 gallon boil and no mixing? I was told that mixing all at once would make it a claner beer..