I recently made an IPA and into the fermenter bucket wet 5.5 gallons. I used safe ale s-04 yeast, 2 packs re hydrated. I racked to secondary with 3 oz of hop pellets for 10 days and i had a thick yeast cake left in the bottom of the bucket. I also had a pretty sizeable yeast cake in my secondary bucket after I transferred into my bottling bucket. When i was done racking I only had slightly over 4 gallons. How on earth did I loose almost 1.5 gallons in the fermentor? this is the most Ive ever lost and I wont brew another IPA again if this is what I can expect. Is this typacle?