I just replaced the wax ring under my toilet. Now when you flush, it leaks worse than it did before! I am so confused! Is there something else that needs to be replaced?
As alluded to by 'The Evil Greebo', there is an oversize (thicker) wax ring readily available. Make sure there are no obstructions on the toilet flange and bottom of the toilet.
I would recommend against using 2 wax rings due to the increased possibility of leaks. Short of hiring a plumber to raise the flange, there are products like this that allow you to raise the flange and still follow building codes.