Quick question. Finished my third smoke on my 22' WSM. I used my Thermo TP-08 at the grate level and the temp at the grate level is 25 degrees hotter then the factory thermo on the lid. I realize that the factory thermos are never accurate but I expected it to read hotter at the lid then at the grate. My question is, is it usually hotter at the grate or at the lid? I would think the lid but I could be wrong. Is the factory thermo that far off in the negative?