Whirlpool SF216LXS Gas Cooking Range

Its beena couple of months since I bought this oven and I love it.  I love the fact that it has five burners and the fith burner is interchangable as a griddle or regular burner.  I have no problems with heat adjustment or the burners and my food cooks...

burners do not adjust much at all. We have propane and changed all orifices including incoming line. It either burns on simmer or when frying, it leaves food greasy for lack of a high enough heat setting.