What type of thermostat do you have ?
It is more likely that the thermostat is not level on the wall, if you remove the front part of the thermo sat with I believe three small slotted screws it will remove the thermostat and leave the base on the base you will see a line across it , it s a level line, make sure that the line is level or the thermostat will not react at the right temperature, before doing that though can you tell me what will happen if you turn the heat up higher ? Will it run longer and drive the temperature higher than what it is right now ? By the way the anticipator setting only goes to 1.8 on that thermostat.
The anticipator setting depends on the type of furnace if this is a newer furnace you can turn it up to 1.2 , if is is an old one with a pilot that is lit all the time you can set it lower to around .3 , the higher the setting the less it will cycle but more it overshoots and lower the setting the more it will cycle but it may not reach the desired setting, so you got to kind of play it by ear. I just gave you the starting points, usually though .8 to 1.2 is good for most systems.