I noticed when I first start a fire in my stove, if I don't leave the door open for some time, the kindling will go out and it will just smolder. If I leave the door open just a crack until the top of the stove gets warm, it has enough draft to keep burning. Is this normal? I also can't add any substantial sized piece of wood until I have a good base of coals from smaller sized pieces. I did a search here and couldn't find anything. Thanks.