Does anyone know a fair amount about Hearthstone or soap stone stoves? I have a Hearthstone Homestead and was cleaning the sides today and noticed a couple of cracks in the lower stones at the top of the stone. One on the left side and one on the right side in the same place. (see attached photo) The stove was broken in easy for the first week according to the manual and has never seen 500 degrees for a stove top temperature. Does this look like a warranty issue or is this normal with a soap stone stove?