Hello all. I recently purchase the square gaskets (2) that sit on the front of the Harmon TL300 firedome but behind the front facing bricks. The original gaskets were one piece but rather thick. The replacement package had 4 gaskets of which two put together appear to be the thickness of the original single gasket. Am I correct in thinking I need to replace the single original gasket with 2 of the new ones placed together? Thanks