I used two wax seals to set my toilet since the flange is 1/4" below the new tile. At first it seemed to be water tight but after a few flushes I noticed water seeping and pulled it out. As can be seen in the photo, the wax ring slid off center. I couldn't use just one ring since it protrudes about 1/4" below the toilet so that would just barely touch the flange. I found the flange extender in another post and will try that. One of these
So to my question. Is this the correct approach? Should the flange be level with the floor prior to installation?
Edit: The correct height of the flange is sitting on top of the finished floor. Of course with a remodel this is almost never going to be the case after tiling. There seem to be various methods to raise the flange. Many say the double wax ring is problematic since it can collapse into the drain over time. This link discusses a number of products to solve the problem. In summary, the set-rite (~18 + shipping) is the most expensive and apparently the only code approved product. The cheapest option is flange extenders ~$3-5. The funny thing is neither the tiler or the plumber that worked on my bathroom mentioned anything about the height problem, which leads me to believe the common solution is the double wax ring.