I brewed some oatmeal stout yesterday. This was a full 10 gallon boil that was pumped through a plate chiller and cooled down to 80* very fast. The first reading was suppose to be 1.050. well it came out at 1.072 ( I adjusted the temp for a 60* reading) I added 1# of malto dextrin this was not in the original recipe. would the malto dextrin make for a higher reading?