I have a pit boss 1230BL. I have noticed a considerable difference in the temperature on the dial setting versus that on the temperature gauge on the smoker lid. Typically it is about 75° difference, for example if the cooking temp is set at 225°, the internal temperature on the dial, which is on the lid, will show 300°. Can anyone tell me if this is a normal thing with pit boss smokers or if there's some malfunction that I should be aware of and get fixed. thanks for looking.