That thermometer is good for measuring ambient temps and humidity, but not for the actual temp of the UTH (or your hot spot). It is time to invest in a probe thermometer. Stick it right on top of the UTH in the tank (under the substrate, right on the glass). Are you controlling your UTH with anything? If not, you will either need to purchase a thermostat (preferred) or a piggy-back lamp dimmer (they can get the job done but are not as reliable).
Once you get the probe thermometer, you will probably realize you don't need the two heat lamps. Maybe one if you are having trouble keeping the ambient up. What is the flukers thermometer reading?