Improve adjustability of gas stove
Propane and Natural Gas Are Supplied at Different Pressures
A propane stove orifice size is about 0.082 inches (drill size 45), but the valve on a similar stove that uses natural gas needs an orifice that is almost 0.125 inches (drill size 35).
If you are running your range from propane but using the orifice for natural gas, you will get this behaviour.  You may need to buy or install the correct orifice for propane.