ok so I have two thermpro temp wireless thermometers. one I bought new when I bought my grill and one I bought because it had more probes. I bought these two within a week of eachother. maybe one cook more than the other........ so my problem is the two different set up even though they are made by the same company, they are giving very conflicting measurements. not by a couple degrees I am talking like 40 deg difference. I have done the ice water temp test and they are all within a degree or two of eachother. its when the eternal temp of my smoker I am getting such a variance on. what am I doing wrong?