So I kegged my first 2 beers yesterday, I siphoned them into the kegs after purging them with co2 then putting a blanket of co2. I put them in my kegerator overnight and then hooked them up to carbonate them. When I hooked up and turned on the gas, even with the slightest turn of the regulator knob it read at least 15 PSI. Is my regulator broken or am I somehow doing something wrong?