those analog temp and humidity gauges are known to be WAY off (over 10 degrees in either direction) so your temps may not actually be what they say they are until you get your digital probe.

Also, human heating pads are a touchy subject. Personally, I would not recommend a human heating pad for heating a reptile cage because that really isnt its purpose (to be used in a low air flow environment 24/7), I'd use a reptile under tank heater or flexwatt and a reliable, quality thermostat.