Yea thats right, looks like you need it to cut in at a lower temp.
Does the car overheat when driving though? If so you have defo got something up with it as the airflow through the rad is more than enough when travelling more then 30 mph. The fan should only be needed if the car isn't moving!
Does the lower radiator hose get hot when the temp is just over half way? If not your thermostat is buggered.