Hi,
Ah, sorry I misread that, The probe you tape to the heatpad outside of the tank is the thermostat probe - there is no benefit in having thermometer probes there as they would only be second guessing the thermostat probe accuracy.
The thermostat reading isn't really all that critical as long as it holds steady and creates the right temperatures inside the tank where the animal is.
Keep the thermometer probes free and move them around inside the tank to make sure everything is corrct and turn the thermostat up or down until it is - if the thermostat has to be set to 98f to get the temps in the warm side to 93f then it really doesn't matter at all.
Just remember to measure the temp under the substrate too to make sure it doesn't get to a dangerous level and adjust the dept/ type of substrate until it is fixed if it does.
Also I have to correct your wattage point on the flexwatt - they are the same wattage per foot. So if one is longer or shorter then it has a different total wattage as a heater.
dr del