freezing in the fridge

With the freezer section set to 19 deg, the fridge side settled in at 20 deg......much too cold for a fridge.  I discovered that the temporary barrier that I had use as a "spillover" barrier did not seat firml against the edges of the fridge so cold air was making it's way right into the fridge side rendering it essentially part of the freezer.  Next step will be to create an insulated barrier with a thermostatically controlled spillover fan.  This should allow me to control both the freezer temp and the fridge temp.