I installed tile in my bathroom and now I'm ready to install the toilet. Upon cleaning and inspection, I noticed the plastic flange was cracked on 1 side and the other side is pulled up like someone overtightened it. The tile is installed already and it's flush with height of the flange. I know about putting 2 wax rings on to compensate for the height difference but I have no room to install flange spanners under the flange as the tile is too close to the flange. Can I mount the spanners on top of the flange? Will the wax seal properly doing this? Could I take some wax and spread it over the flange and spanner before putting the wax rings on? Or any other suggestions? The flange is in a concrete floor so installing a new flange is out of the question.