Greetings from New Zealand! I am new to smoking and I decided to purchase a Navigator 550G, I have used my smoker 4 times and noticed that my meat takes ages to cook compared to recipes and videos on youtube. I decided to investigate my ambient temperature by placing an Inkbird thermometer and Pitboss Probe thermometer in the middle of the grill for comparison and found that I am 30degrees out from what the PB actual temp is measuring on the display. Is this discrepancy normal or is there something wrong with my unit? I have a Thermopro handheld thermometer which measures similar to my Inkbird, the PB probe thermometer is always 4deg higher. I have attached photos for reference, measured in 2 different occasions. Hoping for some help and advice. Thank you.