I've installed a toilet before but this time I'm having lots of trouble and kind figure out why. I took it up to lay down a new tile floor after removing the carpet. After the floor was done I bought a flange riser kit which has two spacers for making the flange taller. The first time I tried it with one and snugged the bolts down tight; it was okay until I put the tank on and then the front of the base came off the ground. Then I tried it with two spacers but didn't tighten the bolts right away. Instead I put the tank on first and let the weight push down on the wax instead of putting pressure on the bolts. The same thing happened. The front won't stay down. I've retried both single and double spacers again but sat on it while slowly putting pressure on the bolts. I also used a generous amount of plumbing putty around the edge. It stayed down for a while but then came up a bit. I sat on it again and snugged the nuts down a bit more and here I am screaming at the toilet and typing for help. What causes this? I put a straigh edge on the floor and it seems straight and level. jeremy And how much putty should I leave when I scrape off the excess? Should it still be visible?