I bought a Flame Broil 100 for my BGE. I set it for a 235 pit temp and put my boston butt on last night around 10:30. Per the Flame Broil regulator, the temp has been right around 235 all night. The meat temp is up to 170. All seems to be well. But....the thermometer attached to the BGE says the temp is below 200. Should I be concerned?