My kit came with 2 gaskets, 1 spacer and 2 bolts (but, oddly, no instructions). I can see how a gasket is needed between the existing flange and the spacer, but why a 2nd gasket? Do I install a 2nd flange on top of the 2nd gasket so I end up with existing flange => gasket => spacer => gasket => 2nd flange? I'm tiling my floor and think the 2nd flange (if used) would be too far above my finished floor.