Post Boil wayyy off from recipe on Grainfather

I use a Grainfather FYI.Has anyone ever had this happen? Here's the story:I followed my recipe with regards to mash water and sparge water.8lbs Vienna 3lbs White Wheat .5lbs Carapils6.1 Gallon batch. I always cheat and round up on the mash water. So 4.87 gallons becomes 5. Sparge water is about exact. 3.75 gallons.After my Mash and sparge I had about 7.2 gallons.60 min boil. 3 ounces total hops in a spider.Post Boil amount was 5.8 gallons.I got better than expected efficiency on the mash.. 1.045 and hit what it was supposed to be after the boil. 1.048.Over a gallon boiled off and I didn't move much on gravity. Weird right? Oh... And after losses I probably only have like 4-4.5 gallons in the fermenter. via /r/Homebrewing https://ift.tt/2OiEJyN