I don't worry about what a thermometer says - I go by the chicks themselves. If they're cheeping a distressed sounding cheep and piling up, I know I need to either lower the frame a bit or turn up the heat a bit. If they are running all over the place, eating, drinking, and pooping, they are just fine.
Very early in the thread, @azygous wondered about the temperature under the pad. So I rigged up a wireless digital thermometer in there. The room the chicks were in was 69 degrees. Under Mama Heating Pad it was 82.5. The chicks were quiet, content, and thriving. So that conventional temperature chart can go right out the window with this system. You aren't heating the entire area - just the little area under the pad, just like with a Mama Hen. If they get chilly, they pop underneath or on top. The rest of the time they are out exploring, learning, and feathering out well due to the fact that they are exposed to varying temps, like naturally raised chicks. If you've ever seen a broody with her chicks, they actually spend very little time directly under her, even in freezing temps. If you have yours reading 92 right now, and figuring that their own combined body heat will raise that a bit more, you could actually come down a bit on the temperature.